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I.—Notes on the Devonians and Old Red Sandstone of North and South Devon
Published online by Cambridge University Press: 01 May 2009
Extract
It may seem to many geologists, accustomed to speak of the “simple order of North Devon,” a somewhat unusual process to fall back on the more troubled districts of the southern division of the County for evidence upon which to take one's stand in interpreting the grand facts of succession within the original “Devonian” area, Devonshire. That is, however, the plan of campaign which I shall adopt; but instead of publishing the paper I read last year before the British Association, in Section C, at Plymouth (which will appear in abstract in the Annual volume of Reports), I will only recapitulate the facts I then brought forward, relating to the southern limestones of Torbay.
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References
Page 195 note 1 A photograph in Frith's Series, No. 5901, shows this admirably. In fact much of the details might be noted down on the Six-inch Maps, from the great number of excellent photographs which illustrate this coast.
Page 196 note 1 I do not venture to say that there is but one limestone horizon, but there are certainly not so many as there are bands on the map.
Page 196 note 2 This is not a more striking change than that the Wenlock formation should in one tract consist of the Denbighshire grits, inseparable from its lower portions, in another of the Llantysilio flagstones, and thirdly of the soft calcareous shales and limestones of Siluria.
Page 196 note 3 I shall not now dwell upon this aspect of the subject, viz. the relations of the Culm Measures and Devonians. Mr. H. B. Woodward and Mr. Reid (of H. M. Geological Survey) have laboured successfully in this field. I hope on some future occasion myself to describe a new area of Culm shales and grits resting in perfect conformity on Devonian limestones.
Page 197 note 1 A selection of these are, at this moment, in the Editor's hands for determination as far as possible.