Small–scale isoclinal folds in Pre–Cambrian schists and quartzites near Frenchmans Cap, Tasmania, were formed during the Pre–Cambrian Frenchman Orogeny but the large open folds were produced during the Devonian Tabberabberan Orogeny. The Mary Antiform (Devonian) at the Raglan Range can be “unrolled” to leave the foliations almost horizontal, indicating that the isoclinal folds were recumbent prior to the Palaeozoic.

The nature of the contact between Pre–Cambrian and Palaeozoic rocks on the western flanks of the Malvern Hills is discussed. Evidence from the regional geological setting and from the contact exposed in Gullet Quarry is only consistent with a faulted junction. Interpretations by Butcher (1962), Reading and Poole (1961) cannot be supported in the field and it is proposed to revert to Groom's (1899) interpretation of the western margin of the Pre–Cambrian as the outcrop of a major fault.

The material for this work came from an extensive temporary exposure in the Vale of Belvoir (South Notts) which cut across the outcrops of some 70 feet of Lower Liassic Beds. Approximately one–third of the Gryphaea shells carried developmental stages. The youngest of these consisted of larval shells closely resembling those of the modern Ostrea. During the breeding season larvae settled at least twice. The growth of spat is described. The great majority of these died in early life and relatively few grew to later stages. About 5 per cent broke loose. Many of the host shells started life attached to small shells or fragments. A study of life conditions throws light on the course of deposition in Liassic waters.

An Upper Maastrichtian assemblage of planktonic foraminifera is recorded from chalk dredged from Galicia Bank, a non–magnetic seamount off the west coast of Spain. The occurrence and distribution of Upper Cretaceous sediments and fossils in the North Atlantic is reviewed, and their significance for the palaeogeography of the North Atlantic during the Upper Cretaceous is considered.

The graptolitic mudstones, which constitute an important facies of the Silurian strata of the region, are described, and their evolution in time is considered to reflect gradually changing conditions in the depositional environment. The associated facies are discussed and, where possible, their roles assessed.

The usefulness of the term slide for a fault formed in close connection with folding is discussed, and a definition suggested.

The paper deals with regional variations in the contact–effects of Caledonian granites and in the characters of certain associated minor intrusions in the metamorphic Caledonides. It is suggested that these variations are related to the thermal structure of the fold–belt at the time of emplacement.