Search

I. Introduction and Previous Literature. The strata which form the subject of this paper make up a small part of the Cambrian succession cropping out near Nuneaton, in the very heart of the Midlands. Here, an inlier of Cambrian age forms a narrow belt of country about 9 miles long, running in a general north-westerly and south-easterly direction, between the towns of Atherstone and Bedworth. On the north-eastern side lies the rolling plain of down-thrown Trias, while on the opposite, or south-western side, the highly-dipping Cambrian shales are unconformably overlain by the Coal Measures. In the early Geological Survey publication of 1859, by H. H. Howell, these lower strata were not differentiated from the overlying Carboniferous System. The Lower Cambrian Quartzites were correlated with the Millstone Grit Series, while the immediately overlying shales were included in the Coal-Measure Shales proper. The next noteworthy contribution was the brilliant work of Samuel Allport in 1879, on the intrusive igneous rocks. To these he applied the term ‘diorites,’ distinguishing them from the doleritic type that usually occurs in the Carboniferous of the Midlands. However, it was not until 1882 that Prof. Charles Lapworth and W. J. Harrison, noting the similarity of the quartzites of Lickey and Hartshill, investigated the area, and proved the bedded nature of the Lower Caldecote igneous rocks. Finally, by the discovery of Cambrian Lingulae in the overlying shales at Stockingford Cutting, Prof. Lapworth was able to establish the true age of these beds. The same author divided the succession

In the middle of the Island of Trinidad, south of the Central Range, is a broad undulating lowland. It stretches across the Island at its narrowest part, practically in the latitude of San Fernando. Towards the west it is the heart of the sugar-cane industry; towards the east it merges into the low ground of the Nariva, a derelict lowland of forest and swamp. It is to the western portion of this lowland that the name Naparima is usually applied. The present paper is concerned with the area extending from the Gulf of Paria on the west to Princes Town on the east. Its northern boundary is formed by the foothills of the Central Range, while on the south it extends practically to the Oropuche lagoon, a total area of approximately 35 square miles. The Naparima area includes a large portion of the famous black soils of Trinidad, which have been utilized extensively for sugar-cane plantations. From it almost every vestige of the primitive forest has long been removed, and the undulating lowland is now one broad expanse of cane-fields, while in places a less fertile patch is given over to grass or guava scrub. From the distance it looks like one broad plain, but actually it is covered almost entirely by a complicated valley-system, leaving the intermediate high ground as a ‘fingering’ system of hog-backed ridges. These practically all attain the same general height, and are the remnants of an uplifted and partly dissected peneplain, tilted gradually westwards to

At a meeting of the Institute of Petroleum held at the Royal Society of Arts in London, April 29, 1943, Professor V. C. Illing, a Vice‐President of the Institute, delivered a paper entitled Education and the Petroleum Industry which was published in the Journal of the Institute of Petroleum, Vol. 29, No. 238, pp. 259–283 (October, 1943). The section on exploration appeared to be of particular interest: consequently, permission was secured from Professor Illing and the Institute to reprint it. (Editor’s Note.)

n/a

Discusses stratigraphy and its relation to petroleum source rocks, reservoirs, and preservation.

http://archive.org/details/thedesignndimple1094515649

n/a