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Parallel geological development in the Dunnage Zone of Newfoundland and the Lower Palaeozoic terranes of southern Scotland: an assessment

Published online by Cambridge University Press:  03 November 2011

S. P. Colman-Sadd ,
P. Stone ,
H. S. Swinden  and
R. P. Barnes
S. P. Colman-Sadd
Affiliation:
S. P. Colman-Sadd and H. S. Swinden, Geological Survey Branch, Newfoundland Department of Mines and Energy, P.O. Box 8700, St John's, Newfoundland A1B 4J6, Canada
P. Stone
Affiliation:
P. Stone and R. P. Barnes, British Geological Survey, Murchison House, West Mains Road, Edinburgh EH9 3LA, U.K.
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Abstract

The Notre Dame and Exploits subzones of Newfoundland's Dunnage Zone are correlated with the Midland Valley and Southern Uplands of Scotland, using detailed comparisons of two key Lower Palaeozoic successions which record similar histories of extension and compression. It follows that the Baie Verte Line, Red Indian Line and Dover Fault are equivalent to the Highland Boundary Fault, Southern Upland Fault and Solway Line, respectively.

The Betts Cove Complex and overlying Snooks Arm Group of the Notre Dame Subzone are analogous to the Ballantrae Complex of the Midland Valley, both recording the Arenig evolution and subsequent obduction of an arc and back-arc system. The Early Ordovician to Silurian sequence unconformably overlying the Ballantrae Complex is poorly represented in the Notre Dame Subzone but important similarities can still be detected suggesting corresponding histories of continental margin subsidence and marine transgression.

In the Exploits Subzone, Early Ordovician back-arc volcanic rocks are overlain by Llandeilo mudstones and Late Ordovician to Early Silurian turbidites. A similar stratigraphy occurs in the Northern and Central Belts of the Southern Uplands and both areas have matching transpressive structural histories. Deeper erosion in the Exploits Subzone reveals Cambrian and Early Ordovician volcano-sedimentary sequences structurally emplaced on the Gander Zone, and such rocks are probably present beneath the Southern Uplands. Combined data from the Notre Dame Subzone and Midland Valley suggest an Arenig southeast-dipping subduction zone. Early Ordovician volcanic rocks in the Exploits Subzone and Southern Uplands have back-arc basin geochemistry and support the model of the Southern Uplands as a transition from back-arc to foreland basin. Preferential emergence of the Dunnage Zone and contrasts between Exploits Subzone and Southern Uplands turbidite basins are attributed to collision of Newfoundland with a Laurentian promontory and Scotland with a re-entrant. This hypothesis also explains the transpressive structural regime common to both areas.

Keywords

comparisonNotre Dame SubzoneExploits SubzoneMidland ValleySouthern Uplandsophiolitesback-arctranspressionpromontoryre-entrantdelamination
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 83 , Issue 3 , 1992 , pp. 571 - 594
Copyright
Copyright © Royal Society of Edinburgh 1992

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References

Anderson, T. B. 1987. The onset and timing of Caledonian sinistral shear in County Down. J. GEOL SOC LONDON 144, 817–25.CrossRefGoogle Scholar
Anderson, T. B. & Oliver, G. T. H. 1986. The Orlock Bridge Fault: a major Late Caledonian sinistral fault in the Southern Uplands terrane, British Isles. TRANS R SOC EDINBURGH: EARTH SCI 77, 302–22.CrossRefGoogle Scholar
Armstrong, H. A., Clarkson, E. N. K. & Owen, A. W. 1990. A new Lower Ordovician conodont faunule from the Northern Belt of the Southern Uplands. SCOTT J GEOLOGY 26, 47–52.CrossRefGoogle Scholar
Arnott, R. J. 1983. Sedimentology of Upper Ordovician-Silurian sequences on New World Island, Newfoundland: separate fault-controlled basins? CAN J EARTH SCI 20, 345–54.CrossRefGoogle Scholar
Arnott, R. J., McKerrow, W. S. & Cocks, L. R. M. 1985. The tectonics and depositional history of the Ordovician and Silurian rocks of Notre Dame Bay, Newfoundland. CAN J EARTH SCI 22, 607–18.CrossRefGoogle Scholar
Barnes, R. P., Anderson, T. B. & McCurry, J. A. 1987. Along-strike variation in the stratigraphical and structural profile of the Southern Uplands Central Belt in Galloway and Down. J GEOL SOC LONDON 144, 807–16.CrossRefGoogle Scholar
Barnes, R. P., Lintern, B. C. & Stone, P. 1989. Timing and regional implications of deformation in the Southern Uplands of Scotland. J GEOL SOC LONDON 146, 905–8.CrossRefGoogle Scholar
Bédard, J. H. 1991. Cumulate recycling and crustal evolution in the Bay of Islands ophiolite. J GEOL 99, 225–49.CrossRefGoogle Scholar
Bergström, S. M. 1971. Conodont biostratigraphy of the Middle and Upper Ordovician of Europe and eastern North America. GEOL SOC AM MEM 127, 83–157.Google Scholar
Bergström, S. M., Riva, J. & Kay, M. 1974. Significance of conodonts, graptolites and shelly fauna from the Ordovician of western and north-central Newfoundland. CAN J EARTH SCI 11, 1625–60.CrossRefGoogle Scholar
Berry, W. B. N. & Boucot, A. J. 1970. Correlation of North American Silurian Rocks. GEOL SOC AM SPEC PAP 102.Google Scholar
Bird, J. M. & Dewey, J. F. 1970. Lithosphere plate-continental marginal tectonics and the evolution of the Appalachian Orogen. GEOL SOC AM BULL 81, 1031–60.CrossRefGoogle Scholar
Blewett, R. S. & Pickering, K. T. 1988. Sinistral shear during Acadian deformation in north-central Newfoundland, based on transecting cleavage. J STRUCT GEOL 10, 125–7.CrossRefGoogle Scholar
Blewett, R. S. & Pickering, K. T. 1989. Sinistral shear during Acadian deformation in north-central Newfoundland, based on transecting cleavage: Reply. J STRUCT GEOL 11, 366–8.CrossRefGoogle Scholar
Bluck, B. J. 1983. Role of the Midland Valley of Scotland in the Caledonian orogeny. TRANS R SOC EDINBURGH: EARTH SCI 74, 119–36.CrossRefGoogle Scholar
Bluck, B. J., Halliday, A. N., Aftalion, M. & Macintyre, R. M. 1980. Age and origin of the Ballantrae ophiolite and its significance to the Caledonian orogeny and the Ordovician time scale. GEOLOGY 8, 492–5.2.0.CO;2>CrossRefGoogle Scholar
Bostock, H. H., Currie, K. L. & Wanless, R. K. 1979. The age of the Robert's Arm Group, north-central Newfoundland. CAN J EARTH SCI 16, 599–606.CrossRefGoogle Scholar
Botsford, J. W. 1987. Depositional history of Middle Cambrian to Lower Ordovician deep water sediments, Bay of Islands, western Newfoundland. Unpublished Ph.D. thesis, Memorial University of Newfoundland.Google Scholar
Caron, A. & Williams, P. F. 1988. The multi-stage development of the Dover Fault in northeastern Newfoundland: the late stages (abstr.); GEOL ASSOC CAN PROG ABSTR 13, A17.Google Scholar
Casey, J. F. & Kidd, W. S. F. 1981. A parallochthonous group of sedimentary rocks unconformably overlying the Bay of Islands ophiolite complex, North Arm Mountain, Newfoundland. CAN J EARTH SCI 18, 1035–50.CrossRefGoogle Scholar
Chandler, F. W., Sullivan, R. W. & Currie, K. L. 1987. The age of the Springdale Group, western Newfoundland, and correlative rocks—evidence for a Llandovery overlap assemblage in the Canadian Appalachians. TRANS R SOC EDINBURGH: EARTH SCI 78, 41–9.CrossRefGoogle Scholar
Church, W. R. & Gayer, R. A. 1973. The Ballantrae ophiolite. GEOL MAG 110, 497–510.CrossRefGoogle Scholar
Church, W. R. & Stevens, R. K. 1971. Early Palaeozoic ophiolite complexes of the Newfoundland Appalachians as mantleoceanic crust sequences. J GEOPHYS RES 76, 1460–466.CrossRefGoogle Scholar
Cocks, L. R. M. & Toghill, P. 1973. The biostratigraphy of the Silurian rocks of the Girvan District, Scotland. J GEOL SOC LONDON 129, 209–43.CrossRefGoogle Scholar
Coish, R. A., Hickey, R. & Frey, F. A. 1982. Rare earth element geochemistry of the Betts Cove ophiolite, Newfoundland: complexities in ophiolite formation. GEOCHEM COSMOCHIM ACTA 46, 2117–34.CrossRefGoogle Scholar
Colman-Sadd, S. P. 1982. Two stage continental collision and plate driving forces. TECTONOPHYSICS 90, 263–82.CrossRefGoogle Scholar
Colman-Sadd, S. P. 1985. Geology of the west part of Great Burnt Lake (12/A8) area. In Current Research, 105–13 Newfoundland Department of Mines and Energy, Mineral Development Division, Report 85-1.Google Scholar
Colman-Sadd, S. P. 1988. Geology of the Snowshoe Pond (12A/7) map area. In Current Research, 127-34, Newfoundland Department of Mines, Mineral Development Division, Report 88-1.Google Scholar
Colman-Sadd, S. P. 1989. Miguels Lake area (2D/12): an update of the geology. In Current Research, 47-53. Newfoundland Department of Mines, Geological Survey of Newfoundland, Report 89-1.Google Scholar
Colman-Sadd, S. P. & Swinden, H. S. 1984. A tectonic window in Central Newfoundland? Geological evidence that the Appalachian Dunnage Zone may be allochthonous. CAN J EARTH SCI 21, 1349–67.CrossRefGoogle Scholar
Colman-Sadd, S. P., Dunning, G. R. & Dec, T. 1992. Dunnage—Gander relationships and Ordovician orogeny in central Newfoundland: a sediment provenance and U/Pb age study. AM J SCI 292, 317–55.CrossRefGoogle Scholar
Coyle, M. 1990. Geology, geochemistry and geochronology of the Springdale Group, an early Silurian caldera in central Newfoundland. Unpublished Ph.D. thesis, Memorial University of Newfoundland, St. John's.Google Scholar
Coyle, M. & Strong, D. F. 1987. Geology of the Springdale Group: a newly recognized Silurian epicontinental-type caldera in Newfoundland. CAN J EARTH SCI 24, 1135–48.CrossRefGoogle Scholar
Cowie, J. W. & Bassett, M. G. 1989. International Union of Geological Sciences 1989 global stratigraphic chart with geochronometric and magnetostratigraphic calibration. EPISODES 12, suppl.Google Scholar
Crawford, A. J., Falloon, T. J. & Green, D. H. 1989. Classification, petrogenesis and tectonic setting of boninites. In Crawford, A. J. (ed.) Boninites and Related Rocks, 1–49. Boston: Unwin Hyman.Google Scholar
Curry, G. B., Bluck, B. J., Burton, C. J., Ingham, J. K., Siveter, D. J. & Williams, A. 1984. Age, evolution and tectonic history of the Highland Border Complex, Scotland. TRANS R SOC EDINBURGH: EARTH SCI 75, 113–33.CrossRefGoogle Scholar
Dallmeyer, R. D. & Williams, H. 1975. 40Ar/39Ar ages from the Bay of Islands metamorphic aureole: their bearing on the timing of Ordovician ophiolite obduction. CAN J EARTH SCI 12, 1685–90.CrossRefGoogle Scholar
Dean, P. L. 1978. The volcanic stratigraphy and metallogeny of Notre Dame Bay. Memorial University of Newfoundland Geological Report 7.Google Scholar
Dean, P. L. & Meyer, J. R. 1982. Metallogenic study of Mid-Ordovician cherts and shales of central Newfoundland. In Current Research, 175–87. Newfoundland Department of Mines and Energy, Mineral Development Division, Report 82-1.Google Scholar
Dec, T. & Colman-Sadd, S. P. 1990. Timing of ophiolite emplacement onto the Gander Zone: evidence from provenance studies in the Mount Cormack Subzone. In Current Research, 289–303. Newfoundland Department of Mines and Energy, Geological Survey Branch, Report 90-1.Google Scholar
Dec, T., Swinden, H. S. & Floyd, J. D. 1992. Sedimentological, geochemical and sediment-provenance constraints on stratigraphy and depositional setting of the Strong Island Chert (Exploits Subzone, Notre Dame Bay). In Current Research, 85–96. Newfoundland Department of Mines and Energy, Geological Survey Branch, Report 92-1.Google Scholar
Dempster, T. J. & Bluck, B. J. 1991. The age and tectonic significance of the Bute amphibolite, Highland Border Complex, Scotland. GEOL MAG 128, 77–80.CrossRefGoogle Scholar
Doolan, B. L., Gale, M. H., Gale, P. N. & Hoar, R. S. 1982. Geology of the Quebec re-entrant: possible constraints from early rifts and the Vermont-Quebec serpentine belt. In St-Julien, P. & Béland, J. (eds) Major Structural Zones and Faults of the Northern Appalachians, 87–115. GEOL ASSOC CAN SPEC PAP 24.Google Scholar
Dunning, G. R. 1987. Geology of the Annieopsquotch Complex, southwest Newfoundland. CAN J EARTH SCI 24, 1162–74.CrossRefGoogle Scholar
Dunning, G. R. & Chorlton, L. B. 1985. The Annieopsquotch ophiolite belt of southwest Newfoundland: geology and tectonic significance. GEOL SOC AM BULL 96, 1466–76.2.0.CO;2>CrossRefGoogle Scholar
Dunning, G. R. & Krogh, T. E. 1985. Geochronology of ophiolites of the Newfoundland Appalachians. CAN J EARTH SCI 22, 1659–70.CrossRefGoogle Scholar
Dunning, G. R. & Krogh, T. E. 1986. Geochronology of ophiolites of the Newfoundland Appalachians: Reply. CAN J EARTH SCI 23, 1862–4.CrossRefGoogle Scholar
Dunning, G. R. & Krogh, T. E. 1988. Advanced techniques in U/Pb zircon geochronology applied to stratigraphic correlation: examples from the Ordovician of the Appalachians. 5th International Symposium on the Ordovician System, Memorial University of Newfoundland, Program with abstracts, 26.Google Scholar
Dunning, G. R., Kean, B. F., Thurlow, J. G. & Swinden, H. S. 1987. Geochronology of the Buchans, Roberts Arm and Victoria Lake Groups and Mansfield Cove Complex, Newfoundland. CAN J EARTH SCI 24, 1175–84.CrossRefGoogle Scholar
Dunning, G. R., O'Brien, S. J., Colman-Sadd, S. P., Blackwood, R. F., Dickson, W. L., O'Neill, P. P. & Krogh, T. E. 1990. Silurian orogeny in the Newfoundland Appalachians. J GEOLOGY, 98, 895–913.CrossRefGoogle Scholar
Dunning, G. R., Swinden, H. S., Kean, B. F., Evans, D. T. W. & Jenner, G. A. 1991. A Cambrian island arc in Iapetus: geochronology and geochemistry of the Lake Ambrose volcanic belt, Newfoundland Appalachians. GEOL MAG 128, 1–17.CrossRefGoogle Scholar
Eastler, T. E. 1969. Silurian geology of Change Islands and eastern Notre Dame Bay, Newfoundland. In Kay, M. (Ed.) North Atlantic—Geology and Continental Drift. MEM AM ASSOC PETROL GEOL 12, 425–32.Google Scholar
Elders, C. 1987. The provenance of granite boulders in conglomerates of the Northern and Central Belts of the Southern Uplands of Scotland. J GEOL SOC LOND 144, 853–63.CrossRefGoogle Scholar
Elliott, C. G., Dunning, G. R. & Williams, P. F. 1991. New constraints on the timing of deformation in eastern Notre Dame Bay, Newfoundland, from U/Pb zircon ages of felsic intrusions. GEOL SOC AM BULL 103, 125–35.2.3.CO;2>CrossRefGoogle Scholar
Elthon, D. 1991. Geochemical evidence for formation of the Bay of Islands ophiolite above a subduction zone. NATURE 354, 140–3.CrossRefGoogle Scholar
Evans, D. T. W., Kean, B. F. & Dunning, G. R. 1990. Geological studies, Victoria Lake Group, central Newfoundland. In Current Research, 131–44. Newfoundland Department of Mines and Energy, Geological Survey Branch, Report 90-1.Google Scholar
Evans, J. A., Stone, P. & Floyd, J. D. 1991. Isotopic characteristics of Ordovician greywacke provenance in the Southern Uplands of Scotland. In Morton, A. C., Todd, S. P. & Haughton, P. D. W. (Eds), Developments in Sedimentary Provenance Studies, 161–72. SPEC PUB GEOL SOC LONDON 57.CrossRefGoogle Scholar
Fåhræus, L. E. 1973. Depositional environments and conodont-based correlation of the Long Point Formation (Middle Ordovician), western Newfoundland. CAN J EARTH SCI 10, 1822–33.CrossRefGoogle Scholar
Floyd, J. D. 1982. Stratigraphy of a flysch succession: the Ordovician of W. Nithsdale, SW Scotland. TRANS R SOC EDINBURGH: EARTH SCI 73, 1–9.CrossRefGoogle Scholar
Hamilton, P. J., Bluck, B. J. & Halliday, A. N. 1984. Sm-Nd ages from the Ballantrae complex, SW Scotland. TRANS R SOC EDINBURGH: EARTH SCI 75, 183–7.CrossRefGoogle Scholar
Harper, D. A. T., Williams, D. M. & Armstrong, H. A. 1989. Stratigraphical correlations adjacent to the Highland Boundary fault in the west of Ireland. J GEOL SOC LONDON 146, 381–4.CrossRefGoogle Scholar
Harris, P. M., Farrar, E., Maclntyre, R. M. & York, D. 1965. Potassium-argon age measurements on two igneous rocks from the Ordovician system of Scotland. NATURE 205, 353–3.CrossRefGoogle Scholar
Haworth, R. T. & Jacobi, R. D. 1983. Geophysical correlation between the geological zonation of Newfoundland and the British Isles. In Hatcher, R. D., Williams, H. & Zeitz, I. (Eds) Contributions to the Tectonics and Geophysics of Mountain Chains, 25–32. MEM GEOL SOC AM 158.Google Scholar
Helwig, J. A. 1967. Stratigraphy and structural history of the New Bay area, north-central Newfoundland. Unpublished Ph.D. thesis, Columbia University 211 pp.Google Scholar
Helwig, J. A. 1969. Redefinition of Exploits Group, Lower Paleozoic, northeast Newfoundland. In Kay, M. (Ed.) North Atlantic—Geology and Continental Drift, 408–13. MEM AM ASSOC PETROL GEOL 12.Google Scholar
Helwig, J. A. & Sarpi, E. 1969. Plutonic-pebble conglomerates, New World Island, Newfoundland, and the history of eugeosynclines. In Kay, M. (Ed.) Atlantic-Geology and Continental Drift, 443–6. MEM AM ASSOC PETROL GEOL 12.Google Scholar
Hibbard, J. 1983. Geology of the Baie Verte Peninsula, Newfoundland. Newfoundland Department of Mines and Energy, Mineral Development Division Memoir 2.Google Scholar
Holdsworth, R. E. 1991. The geology and structure of the Gander—Avalon boundary zone in northeastern Newfoundland. In Current Research, 109-26. Newfoundland Department of Mines and Energy, Geological Survey Branch, Report 91-1.Google Scholar
Hutton, D. H. W., Aftalion, M. & Halliday, A. N. 1985. An Ordovician ophiolite in County Tyrone, Ireland. NATURE, LONDON 315, 210–12.CrossRefGoogle Scholar
Ince, D. 1984. Sedimentation and tectonism in the Middle Ordovician of the Girvan district, SW Scotland. TRANS R SOC EDINBURGH: EARTH SCI 75, 225–37.CrossRefGoogle Scholar
Ingham, J. K. 1978. Geology of a continental margin 2: middle and late Ordovician transgression, Girvan. In Bowes, D. R. & Leake, B. E.Crustal Evolution in Northwestern Britain and Adjacent Regions, 163–76. GEOL J SPEC ISSUE 10.Google Scholar
Jacobi, R. D. & Wasowski, J. J. 1985. Geochemistry and plate tectonic significance of the volcanic rocks of the Summerford Group, north-central Newfoundland. GEOLOGY 13, 126–30.2.0.CO;2>CrossRefGoogle Scholar
Jenner, G. A. and Fryer, B. J. 1980. Geochemistry of the upper Snooks Arm Group basalts, Burlington Peninsula, Newfoundland: evidence against formation in an island arc. CAN J EARTH SCI 17, 888–900.CrossRefGoogle Scholar
Jenner, G. A. & Swinden, H. S. 1989. Trace element and isotope geochemistry of the Pipestone Pond Complex, Newfoundland: complex magmatism in an eastern Dunnage Zone ophiolite (abstr.). GEOL ASSOC CAN, PROG ABSTR 14, A96.Google Scholar
Jenner, G. A., Evans, D. T. W. & Kean, B. F. 1988. Lushs Bight Group revisited: new trace element and Sm/Nd isotopic evidence for its tectonic environment of formation (abstr.). GEOL ASSOC CAN, PROG ABSTR 13, A61.Google Scholar
Jenner, G. A., Dunning, G. R., Malpas, J., Brown, M. & Brace, T. 1991. Bay of Islands and Little Port Complexes, revisited: age, geochemical and isotopic evidence confirm suprasubduction origin. CAN J EARTH SCI 28, 1635–52.CrossRefGoogle Scholar
Kalliokoski, J. 1955. Gull Pond, Newfoundland. GEOL SURV CAN, PAP 54–4.Google Scholar
Karlstrom, K. E. 1982. Stratigraphic problems in the Hamilton Sound area of northeastern Newfoundland. In Current Research, Part B, 43-9. GEOL SURV CAN PAP 82-1B.CrossRefGoogle Scholar
Karlstrom, K. E., van, der Pluijm B. A. & Williams, P. F. 1982. Structural interpretation of the eastern Notre Dame Bay area, Newfoundland: regional post-Middle Silurian thrusting and asymmetrical folding. CAN J EARTH SCI 19, 2325–41.CrossRefGoogle Scholar
Kay, M. 1967. Stratigraphy and structure of north eastern Newfoundland bearing on drift in North Atlantic. AM ASSOC PETROL GEOL BULL 51, 579–600.Google Scholar
Kelling, G. 1962. The petrology and sedimentation of Upper Ordovician rocks in the Rhinns of Galloway, SW Scotland. TRANS R SOC EDINBURGH 65, 107–37.CrossRefGoogle Scholar
Kelling, G., Davies, P. & Holroyd, J. 1987. Style, scale and significance of sand bodies in the Northern and Central belts, SW Southern Uplands. J GEOL SOC LONDON 144, 787–806.CrossRefGoogle Scholar
Kennedy, M. J. 1976. Southeastern margin of the northeastern Appalachians: Late Precambrian orogeny on a continental margin. GEOL SOC AM BULL 87, 1317–25.2.0.CO;2>CrossRefGoogle Scholar
Kennedy, M. J., Neale, E. R. W. & Phillips, W. E. A. 1972. Similarities in the structural development of the northwestern margin of the Newfoundland Appalachians and Irish Caledonides. 24th International Geological Congress, Montreal, Section 3, 516–31.Google Scholar
Kidd, W. S. F. 1974. The evolution of the Baie Verte Lineament, Burlington Peninsula, Newfoundland. Unpublished Ph.D. thesis, Cambridge University, 294 p.Google Scholar
Kidd, W. S. F. 1977. The Baie Verte Lineament: ophiolite complex floor and mafic volcanic fill of a small Ordovician marginal basin. In Talwani, M. & Pitman, W. C. (Eds) Island Arcs, Deep Sea Trenches and Back Arc Basins, 407–18. MAURICE EWING SERIES 1.CrossRefGoogle Scholar
Lafrance, B. & Williams, P. F. 1988. Structural interpretation of the Bay of Exploits area in north-central Newfoundland. GEOL ASSOC CAN, PROG ABSTR 13, A70.Google Scholar
Lambert, R. St J., Holland, J. G. & Leggett, J. K. 1981. Petrology and tectonic setting of some Ordovician volcanic rocks from the Southern Uplands of Scotland. J GEOL SOC LONDON 138, 421–36.CrossRefGoogle Scholar
Lamont, A. & Lindstrom, M. 1957. Arenigian and Llandeilian cherts identified in the Southern Uplands of Scotland by means of conodonts, etc. TRANS EDINBURGH GEOL SOC 17, 60–70.CrossRefGoogle Scholar
Lapworth, C. 1878. The Moffat Series. Q J GEOL SOC 34, 240–346.CrossRefGoogle Scholar
Leggett, J. K. 1980a. The sedimentological evolution of a Lower Palaeozoic accretionary fore-arc in the Southern Uplands of Scotland. SEDIMENTOLOGY 27, 401–17.CrossRefGoogle Scholar
Leggett, J. K. 1980b. Palaeogeographic setting of the Wrae Limestone: an Ordovician submarine-slide deposit in Tweeddale. SCOTT J GEOLOGY 16, 91–104.CrossRefGoogle Scholar
Leggett, J. K., McKerrow, W. S. & Eales, M. H. 1979. The Southern Uplands of Scotland: a Lower Palaeozoic accretionary prism. J GEOL SOC LONDON 136, 755–70.CrossRefGoogle Scholar
Leggett, J. K., McKerrow, W. S., Morris, J. H., Oliver, G. J. H. & Phillips, W. E. A. 1979. The north-western margin of the Iapetus Ocean. In Harris, A. L., Holland, C. H. & Leake, B. E. (Eds). The Caledonides of the British Isles—reviewed, 499–512. SPEC PUB GEOL SOC LONDON 8.CrossRefGoogle Scholar
Lewis, A. D. & Bloxam, T. W. 1977. Petrotectonic environments of the Girvan-Ballantrae lavas from rare-earth element distribution. SCOTT J GEOLOGY 13, 211–22.CrossRefGoogle Scholar
Longman, C. D., Bluck, B. J. & van, Breemen O. 1979. Ordovician conglomerates and the evolution of the Midland Valley. NATURE 280, 578–81.CrossRefGoogle Scholar
Malo, M. 1988. Stratigraphy of the Aroostook-Perce Anticlinorium in the Gaspe Peninsula, Quebec. CAN J EARTH SCI 25, 893–908.CrossRefGoogle Scholar
Malo, M. & Béland, J. 1989. Acadian strike-slip tectonics in the Gaspé region, Quebec Appalachians. CAN J EARTH SCI 26, 1764–77.CrossRefGoogle Scholar
Marillier, F., Keen, C. E., Stockmal, G. S., Quinlan, G., Williams, H., Colman-Sadd, S. P. & O'Brien, S. J. 1989. Crustal structure and surface zonation of the Canadian Appalachians: implications of deep seismic reflection data. CAN J EARTH SCI 26, 305–321.CrossRefGoogle Scholar
Marten, B. E. 1971. Stratigraphy of volcanic rocks in the Western Arm area of the central Newfoundland Appalachians. GEOL ASSOC CAN PROC 24, 73–84.Google Scholar
McKerrow, W. S. & Cocks, L. R. M. 1978. A lower trench-fill sequence, New World Island, Newfoundland. GEOL SOC AM 89, 1121–32.2.0.CO;2>CrossRefGoogle Scholar
McKerrow, W. S. & Elders, C. F. 1989. Movements on the Southern Upland fault. J GEOL SOC LONDON 146, 393–5.CrossRefGoogle Scholar
McKerrow, W. S., Lambert, R. St. J. & Cocks, L. R. M. 1985. The Ordovician, Silurian and Devonian periods. In Snelling, N. J. (Ed.) The Chronology of the Geological Record, 73–9. MEM GEOL SOC LOND 10.CrossRefGoogle Scholar
McMurtry, M. J. 1980. Discussions of: Evidence for Caledonian subduction from greywacke detritus in the Longford-Down inlier. J EARTH SCI R DUBLIN SOC 2, 209–11.Google Scholar
Merriman, R. J. & Roberts, B. 1990. Metabentonites in the Moffat Shale Group, Southern Uplands of Scotland: geochemical evidence of ensialic marginal basin volcanism. GEOL MAG 127, 259–71.CrossRefGoogle Scholar
Molnar, P. & Gray, D. 1979. Subduction of continental lithosphere: some constraints and uncertainties. GEOLOGY 7, 58–62.2.0.CO;2>CrossRefGoogle Scholar
Morris, J. H. 1987. The Northern Belt of the Longford-Down Inlier, Ireland and Southern Uplands, Scotland: an Ordovician back-arc basin. J GEOL SOC LONDON 144, 773–86.CrossRefGoogle Scholar
Neale, E. R. W., Kean, B. F. & Upadhyay, H. D. 1975. Post-ophiolite unconformity, Tilt Cove-Betts Cove area, Newfoundland. CAN J EARTH SCI 12, 880–6.CrossRefGoogle Scholar
Nelson, K. D. 1979. Geology of the Badger Bay-Seal Bay area, north-central Newfoundland. Unpublished Ph.D. thesis. State University of New York at Albany.Google Scholar
Nelson, K. D. 1981. Mèlange development in the Boones Point Complex, north-central Newfoundland. CAN J EARTH SCI 18, 433–42.CrossRefGoogle Scholar
Nelson, K. D. & Casey, J. F. 1979. Ophiolitic detritus in the Upper Ordovician flysch of Notre Dame Bay and its bearing on the tectonic evolution of western Newfoundland. GEOLOGY 7, 27–31.2.0.CO;2>CrossRefGoogle Scholar
Neuman, R. B. 1976. Early Ordovician (late Arenig) brachiopods from Virgin Arm, New World Island, Newfoundland. GEOL SURV CAN BULL 261, 11–61.Google Scholar
Nowlan, G. S. & Thurlow, J. G. 1984. Middle Ordovician conodonts from the Buchans Group, central Newfoundland, and their significance for regional stratigraphy of the Central Volcanic Belt. CAN J EARTH SCI 21, 284–96.CrossRefGoogle Scholar
O'Brien, B. H. 1991. Geological development of the Exploits and Notre Dame subzones in the New Bay area (parts of 2E/6 and 2E/11), Notre Dame Bay, Newfoundland. In Current Research, 155–66. Newfoundland Department of Mines and Energy, Geological Survey Branch Report 91-1.Google Scholar
O'Brien, F. H. C. & Szybinski, Z. A. 1989. Conodont faunas from the Catchers Pond and Cutwell groups, central Newfoundland. In Current Research, 121–5. Newfoundland Department of Mines, Geological Survey of Newfoundland Report 89-1.Google Scholar
O'Neill, P. P. 1981. Geology of the Weir's Pond area. Newfoundland (NTS 2E/1). Newfoundland Department of Mines and Energy, Geological Survey Branch Report 91-3.Google Scholar
O'Neill, P. P. & Knight, I. 1988. Geology of the east half of the Weir's Pond (2E/1) map area and its regional significance. In Current Research, 165–76. Newfoundland Department of Mines, Mineral Development Division, Report 88-1.Google Scholar
Peach, B. N. & Home, J. 1899. The Silurian rocks of Britain, 1: Scotland. MEM GEOL SURV UK.Google Scholar
Piasecki, M. A. J., Williams, H. & Colman-Sadd, S. P. 1990. Tectonic relationships along the Meelpaeg, Burgeo and Burlington Lithoprobe transects in Newfoundland. In Current Research, 327–339. Newfoundland Department of Mines and Energy, Geological Survey Branch Report 90-1.Google Scholar
Pickering, K. T. 1987. Wet-sediment deformation in the Upper Ordovician Point Leamington Formation: an active thrustimbricate system during sedimentation, Notre Dame Bay, north-central Newfoundland. In Jones, M. E. & Preston, R. M. F. (Eds) Deformation of Sediments and Sedimentary Rocks, 213–39. GEOL SOC LONDON SPEC PUB 29.CrossRefGoogle Scholar
Pickering, K. T., Bassett, M. G. & Siveter, D. J. 1988. Late Ordovician—early Silurian destruction of the Iapetus Ocean: Newfoundland, British Isles and Scandinavia—a discussion. TRANS R SOC EDINBURGH: EARTH SCI 79, 361–82.CrossRefGoogle Scholar
Robertson, A. H. F. & Henderson, W. G. 1984. Geochemical evidence for the origins of igneous and sedimentary rocks of the Highland Border, Scotland. TRANS R SOC EDINBURGH: EARTH SCI 75, 135–50.CrossRefGoogle Scholar
Rodgers, J. 1965. Long Point and Clam Bank formations, western Newfoundland. GEOL ASSOC CAN PROC 16, 83–94.Google Scholar
Rushton, A. W. A., Stone, P., Smellie, J. L. & Tunnicliff, S. P. 1986. An Early Arenig age for the Pinbain sequence of the Ballantrae Complex. SCOTT J GEOLOGY 22, 41–54.CrossRefGoogle Scholar
Rushton, A. W. A. & Tripp, R. P. 1979. A fossiliferous lower Canadian (Tremadoc) boulder from the Benan Conglomerate of the Girvan district. SCOTT J GEOLOGY 15, 321–28.CrossRefGoogle Scholar
Sclater, J. C., Hellinger, S. & Tapscott, C. 1977. The palaeobathymetry of the Atlantic Ocean from the Jurassic to the Present. J GEOLOGY 85, 509–52.CrossRefGoogle Scholar
Smellie, J. L. & Stone, P. 1992 Geochemical control on the evolutionary history of the Ballantrae Complex, SW Scotland, from comparisons with recent analogues. In Parson, L. M.Murton, B. J. & Browning, P. (Eds) Ophiolites and their modern oceanic analogues, 171–8. SPEC PUB GEOL SOC LONDON 60.CrossRefGoogle Scholar
Spray, J. G. & Williams, G. D. 1980. The sub-ophiolite metamorphic rocks of the Ballantrae Igneous Complex, SW Scotland. J GEOL SOC LONDON 137, 359–68.CrossRefGoogle Scholar
Srivastava, S. P. 1978. Evolution of the Labrador Sea and its bearing on the early evolution of the North Atlantic. GEOPHYS J R ASTRON SOC 52, 313–57.CrossRefGoogle Scholar
Stevens, R. K. 1970. Cambro-Ordovician flysch sedimentation and tectonics in west Newfoundland and their possible bearing on a proto-Atlantic ocean. In Lajoie, J. (Ed.) Flysch Sedimentology in North America, 165–77. GEOL ASSOC CAN SPEC PAP 7.Google Scholar
Stockmal, G. S. & Waldron, J. W. F. 1990. Structure of the Appalachian deformation front in western Newfoundland: Implications of multichannel seismic reflection data. GEOLOGY 18, 765–8.2.3.CO;2>CrossRefGoogle Scholar
Stockmal, G. S., Colman-Sadd, S. P., Keen, C. E., O'Brien, S. J. & Quinlan, G. 1987. Collision along an irregular margin: a regional plate tectonic interpretation of the Canadian Appalachians. CAN J EARTH SCI 24, 1098–107.CrossRefGoogle Scholar
Stockmal, G. S., Colman-Sadd, S. P., Keen, C. E., Marillier, F., O'Brien, S. J. & Quinlan, G. 1990. Deep seismic structure and plate tectonic evolution of the Canadian Appalachians. TECTONICS 9, 45–62.CrossRefGoogle Scholar
Stone, P. & Rushton, A. W. A. 1983. Graptolite faunas from the Ballantrae ophiolite complex and their structural implications. SCOTT J GEOLOGY 19, 297–310.CrossRefGoogle Scholar
Stone, P. & Smellie, J. L. 1990. The Ballantrae ophiolite, Scotland: an Ordovician island arc—marginal basin assemblage. In Malpas, J. et al. (Eds) Troodos 1987. Ophiolites: oceanic crustal analogues, 535–46. Geological Survey Department, Nicosia, Cyprus.Google Scholar
Stone, P., Floyd, J. D., Barnes, R. P. & Lintern, B. C. 1987. A sequential back-arc and foreland basin thrust duplex model for the Southern Uplands of Scotland. J GEOL SOC LONDON 144, 753–64.CrossRefGoogle Scholar
Stouge, S. 1980. Lower and Middle Ordovician conodonts from central Newfoundland and their correlatives in western Newfoundland. In Current Research, 134–42. Newfoundland Department of Mines and Energy, Mineral Development Division Report 80-1.Google Scholar
Stringer, P. 1975. Acadian slaty cleavage noncoplanar with fold axial surfaces in the northern Appalachians. CAN J EARTH SCI 12, 949–61.CrossRefGoogle Scholar
Strong, D. F. 1977. Volcanic regimes of the Newfoundland Appalachians. In Barager, W. R. A., Coleman, L. C. & Hall, J. M. (Eds) Volcanic Regimes in Canada, 61–90. GEOL ASSOC CAN SPEC PAP 16.Google Scholar
Strong, D. F., Dickson, W. L.O'Driscoll, C. F., Kean, B. F. & Stevens, R. K. 1974. Geochemical evidence for an east-dipping Appalachian subduction zone in Newfoundland. NATURE 248, 37–9.CrossRefGoogle Scholar
Styles, M. T., Stone, P. & Floyd, J. D. 1989. Arc detritus in the Southern Uplands: mineralogical characterization of a “missing” terrane. J GEOL SOC LONDON 146, 397–400.CrossRefGoogle Scholar
Suen, C. J., Frey, F. A. & Malpas, J., 1979. Bay of Islands ophiolite suite, Newfoundland: petrologic and geochemical characteristics with emphasis on rare earth element geochemistry. EARTH PLANET SCI LETT 45, 337–48.CrossRefGoogle Scholar
Sun, S.-S. & Nesbitt, R. W. 1978. Geochemical regularities and genetic significance of ophiolitic basalts. GEOLOGY 6, 689–93.2.0.CO;2>CrossRefGoogle Scholar
Swett, K. & Smit, D. E. 1972. Palaeogeography and depositional environments of the Cambro-Ordovician shallow-marine facies of the North Atlantic. GEOL SOC AM BULL 83, 3223–48.CrossRefGoogle Scholar
Swinden, H. S. 1988. Geology and economic potential of the Pipestone Pond area (12A/1 NE; 12A/8 E), central Newfoundland. Newfoundland Department of Mines, Geological Survey Branch Report 88-2.Google Scholar
Swinden, H. S. 1990. Regional geology and metallogeny of central Newfoundland. In Swinden, H. S., Evans, D. T. W. & Kean, B. F. (Eds) Metallogenic Framework of Base and Precious Metal Deposits, Central and Western Newfoundland, 1–27. 8th IAGOD Symposium, Field Trip Guidebook No. 1. GEOL SURV CAN OPEN FILE 2156.Google Scholar
Swinden, H. S., LeHuray, A. P. & Slack, J. F. 1988. Lead isotopes in volcanogenic sulphides of the northern Appalachians: applications to the correlation of paleotectonic terranes (abstr.). GEOL ASSOC CAN PROG ABSTR 13, A121.Google Scholar
Swinden, H. S., Jenner, G. A., Kean, B. F. & Evans, D. T. W. 1989. Volcanic rock geochemistry as a guide for massive sulphide exploration in central Newfoundland. In Current Research, 201–19. Newfoundland Department of Mines, Geological Survey of Newfoundland Report 89-1.Google Scholar
Swinden, H. S., Jenner, G. A., Fryer, B. J., Hertogen, J. & Roddick, J. C. M. 1990. Petrogenesis and paleotectonic history of the Wild Bight Group: an Ordovician rifted island arc in central Newfoundland. CONTRIB MINERAL PETROL 85, 253–71.Google Scholar
Szybinski, Z. A., Swinden, H. S., O'Brien, F. H. C., Jenner, G. A. & Dunning, G. R. 1990. Correlation of Ordovician volcanic terranes in the Newfoundland Appalachians: lithological, geochemical and age constraints (abstr.) GEOL ASSOC CAN PROG ABSTR 15, A40.Google Scholar
Tapponnier, P. & Molnar, P. 1976. Slip-line field theory and large-scale continental tectonics. NATURE 264, 319–24.CrossRefGoogle Scholar
Tapponnier, P., Peltzer, G. & Armijo, R. 1986. On the mechanics of the collision between India and Asia. In Coward, M. P. & Ries, A. C. (Eds) Collision Tectonics, 115–57. GEOL SOC LONDON SPEC PUB 19.CrossRefGoogle Scholar
Thirlwall, M. F. 1981. Implications for Caledonian plate tectonic models of chemical data from volcanic rocks of the British Old Red Sandstone. J GEOL SOC LONDON 138, 123–38.CrossRefGoogle Scholar
Thirlwall, M. F. 1988. Geochronology of late Caledonian magmatism in northern Britain. J GEOL SOC LONDON 145, 951–67.CrossRefGoogle Scholar
Thirlwall, M. F. & Bluck, B. J. 1984. Sr-Nd isotope and chemical evidence that the Ballantrae ‘ophiolite’, SW Scotland, is polygenetic. In Gass, I. G., Lippard, S. J. & Shelton, A. W. (Eds) Ophiolites and Ocean Lithosphere, 215–30. GEOL SOC LONDON SPEC PUB 13.CrossRefGoogle Scholar
Thomas, W. A. 1977. Evolution of Appalachian-Ouachita salients and recesses from re-entrants and promontories in the continental margin. AM J SCI 277A, 1233–78.CrossRefGoogle Scholar
Tremblay, A. & St. Julien, P. 1990. Structural style and evolution of a segment of the Dunnage Zone from the Quebec Appalachians and its tectonic implications. GEOL SOC AM BULL 102, 1218–29.2.3.CO;2>CrossRefGoogle Scholar
Upadhyay, H. D. 1973. The Betts Cove Ophiolite and related rocks of the Snooks Arm Group, Newfoundland. Unpublished Ph.D. thesis, Memorial University of Newfoundland.Google Scholar
Upadhyay, H. D., Dewey, J. F. & Neale, E. R. W. 1971. The Betts Cove ophiolite complex, Newfoundland: Appalachian oceanic crust and mantle. GEOL ASSOC CAN PROC 24, 27–34.Google Scholar
Wasowski, J. J. & Jacobi, R. D. 1984. Geochemistry and tectonic setting of the Lawrence Head volcanics, north central Newfoundland (abstract). GEOL SOC AM PROG ABSTR 16, 69.Google Scholar
Watson, M. P. 1981. Submarine fan deposits of the Upper Ordovician-Lower Silurian Milliners Arm Formation, New World Island, Newfoundland. Unpublished D. Phil, thesis, University of Oxford, UK.Google Scholar
Wessel, J. 1975. Sedimentary petrology of the Springdale and Botwood formations, Central Mobile Belt, Newfoundland, Canada. Unpublished Ph.D. thesis, University of Massachusetts.Google Scholar
Whalen, J. B., Currie, K. L. & van, Breemen O. 1987. Episodic Ordovician-Silurian plutonism in the Topsails igneous terrane, western Newfoundland. TRANS R SOC EDINBURGH: EARTH SCI 78, 17–28.CrossRefGoogle Scholar
Williams, A. 1962. The Barr and Ardmillan Series (Caradoc) of the Girvan district, southwest Ayrshire. MEM GEOL SOC LONDON 3.Google Scholar
Williams, D. M. 1990. Evolution of Ordovician terranes in western Ireland and their possible Scottish equivalents. TRANS R SOC EDINBURGH: EARTH SCI 81, 23–9.CrossRefGoogle Scholar
Williams, H. 1964. The Appalachians in northeastern Newfoundland-a two-sided symmetrical system. AM J SCI 262, 1137–58.CrossRefGoogle Scholar
Williams, H. 1972. Stratigraphy of Botwood map-area, northeastern Newfoundland. GEOL SURV CAN OPEN FILE 113.Google Scholar
Williams, H. 1975. Structural succession, nomenclature, and interpretation of transported rocks in western Newfoundland. CAN J EARTH SCI 12, 1874–94.CrossRefGoogle Scholar
Williams, H. 1978. Geological development of the northern Appalachians: its bearing on the evolution of the British Isles. In Bowes, D. R. & Leake, B. E. (Eds) Crustal Evolution in Northwestern Britain and Adjacent Regions, 1–22. GEOL J SPEC ISSUE 10.Google Scholar
Williams, H. 1979. Appalachian Orogen in Canada. CAN J EARTH SCI 16, 792–807.CrossRefGoogle Scholar
Williams, H. 1992. Mèlanges and coticule occurrences in the northeast Exploits Subzone, Newfoundland. In Current Research, Part D, 121–7. GEOL SURV CAN PAP 92-1D.CrossRefGoogle Scholar
Williams, H. & Cawood, P. A. 1989. Geology, Humber Arm Allochthon, Newfoundland. GEOL SURV CAN MAP 1678A.CrossRefGoogle Scholar
Williams, H. & Hatcher, R. D. Jr 1983. Appalachian suspect terranes. In Hatcher, R. D., Williams, H. & Zeitz, I., Contributions to the Tectonics and Geophysics of Mountain Chains, 33–53. MEM GEOL SOC AM 158.Google Scholar
Williams, H. & Piasecki, M. A. J. 1990. The Cold Spring Mèlange and a possible model for Dunnage—Gander zone interaction in central Newfoundland. CAN J EARTH SCI 27, 1126–34.CrossRefGoogle Scholar
Williams, H., Colman-Sadd, S. P. & Swinden, H. S. 1988. Tectonic-stratigraphic subdivisions of central Newfoundland. In Current Research, Part B, 91–8. GEOL SURV CAN PAP 88-1B.CrossRefGoogle Scholar
Williams, H., Kennedy, M. J. & Neale, E. R. W. 1974. The northeastward termination of the Appalachian orogen. In Nairn, A. E. M. & Stehli, F. G. (Eds) The Ocean Basins and Margins, Vol. 2, 70–123. New York: Plenum.Google Scholar
Williams, S. H. 1988a. Middle Ordovician graptolites from central Newfoundland. In Current Research, 183–8. Newfoundland Department of Mines, Mineral Development Division Report 88-1.Google Scholar
Williams, S. H. 1988b. Dob's Linn—the Ordovician-Silurian stratotype. In Cocks, L. R. M. & Rickards, R. B. (Eds) A Global Analysis of the Ordovician-Silurian Boundary, 17–30. BULL BRIT MUS NAT HIST GEOLOGY SER 43.Google Scholar
Williams, S. H. & Stevens, R. K. 1988. Early Ordovician (Arenig) graptolites of the Cow Head Group, western Newfoundland, Canada. PALAEONTOGRAPH CAN 5.Google Scholar
Williams, S. H., Colman-Sadd, S. P., O'Brien, B. H. & Boyce, W. D. 1991. New discoveries of Ordovician (Arenig) and Silurian (Llandovery) graptolites from central Newfoundland, and their palaeogeographic implications (abstr.). GEOL ASSOC CAN PROG ABSTR 16, A132.Google Scholar
Wilson, J. T. 1966. Did the Atlantic close and then re-open? NATURE 211, 676–81.CrossRefGoogle Scholar
Winchester, J. A., Williams, H., Max, M. D. & van Staal, C. R. 1992. Does the Birchy Complex of Newfoundland extend into Ireland? J GEOL SOC LONDON 149, 159–62.CrossRefGoogle Scholar
Wonderley, P. F. & Neuman, R. B. 1984. The Indian Bay Formation: fossiliferous Early Ordovician volcanogenic rocks in the northern Gander Terrane, Newfoundland and their regional significance. CAN J EARTH SCI 21, 525–32.CrossRefGoogle Scholar