WHEN a bedding-surface is faulted, a large number of quantities, of more or less significance, may be considered.

The elements involved are: (1) the fault-surface, (2) the net relative movement along it, (3) the bedding-surface, and (4) the surface of outcrop or measurement.

IN December of 1932 a paper was published in the Geological Magazixe (1) dealing with a number of Tertiary orbitoidal foraminifera from N.W. Peru, which had been presented to the British Museum. During the examination of the material it was noticed that there were no forms present comparable to Lepidocyclina R. Douvillei Lisson in regard to the size of the embryonic apparatus, although a large number of the specimens had been collected from Lisson’s type locality. All the forms examined from Mount Organos and from contemporaneous deposits in the neighbourhood proved to have a much smaller apparatus and were found to be identical with Lepidocyclina peruviana (Cushman) when compared with the type material in the Sedgwick Museum, Cambridge.

THE fossiliferous boulders of Neocomian age in glacial deposits at Moreseat, in the parish of Cruden, Aberdeenshire, have been known from the middle of last century and have engaged the attention of many workers, but from nowhere else in Aberdeenshire have, until now, Lower Cretaceous rocks been recorded.

THE dyke which is to be described is of interest for two reasons: first, because a dyke actually cutting the limestones of Derbyshire has never been recorded, and secondly on account of the xenoliths which it contains.

THE Warren House Series consists of lavas which belong to a sodic suite, being rhyolites, keratophyres, and spilites. The rhyolites have a fine-grained micrographic groundmass, and some contain phenocrysts of quartz, orthoclase, anorthoclase, and plagioclase felspar. Epidotization of the rocks has occurred, but it is the felspathic and femic constituents of the groundmass which have suffered alteration and not the felspar phenocrysts, the action not being intense enough to affect the latter. The keratophyres consist essentially of small lath-shaped albite crystals which give a trachytic texture to the rock. The spilites are more basic, vesicular, and variolitic or sub-ophitic in texture, while some of them show pillowstructure in the field. The keratophyres and the spilites also exhibit varying degrees of epidotization. Pyroclastic rocks are not very common, but a few interesting varieties have been noted. Intrusions of dolerite occur within the lavas. One type is an ophitic dolerite, which when fresh probably contained olivine. Another type is now an epidiorite. Both these types have been epidotized, the epidiorite to such an extent that it passes into an epidote-uralite rock in places.