Identifier: quarterlyjournal63190geol (find matches)
Title: The Quarterly journal of the Geological Society of London
Year: 1845 (1840s)
Authors: Geological Society of London
Subjects: Geology
Publisher: London (etc.)
Contributing Library: Smithsonian Institution Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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uniform expanse of theBenin Sands. Erom the occasional appearance beneath the latterof shales and sandstones, as, for example, near and to the north ofBenin City and near Ifon, I think it probable that we have hererepresentatives of the Ijebu Beds of the Lagos Province. Withoutthe advantage of boring-appliances these beds would have remainedalmost unknown in their typical district; a comparison of theseadjacent localities shows that the mode of occurrence and thedegree of consolidation of the two sets of beds which crop outbelow the Benin Sands are all but identical. (b) The Asaba District. At Asaba, and westward as far as the towns of Ibusa and Okpa-nam, the most obvious deposit is a red, somewhat argillaceous sand,correlated in its general composition and compactness with the BeninSands. The sand forms hills rising to a height of at least 250 feetabove low-water Niger. At the bottom of the valleys and in the1 Government Gazette, Protectorate of Southern Nigeria vol. vi (1905)p.287.
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Vol. 6$.~) THE POST-CEETACEOUS OF SOUTHERN NIGERIA. 311 stream-beds, the members of the Lignite Series x above mentionedmay be seen; but, as the country is densely clothed with forest, therange of the beds can only be discovered by an exhaustive search,for which so far there has been no time. Except for the obscure remains of some plants, no fossils werefound in the Lignite Series. This district differs from the Central Province, (1) in that theboundary between the crystalline rocks and the sedimentary depositslies farther north ; and (2) that the sedimentary beds lying betweenthe basement-floor of crystalline rocks and the Benin Sands are,on the whole, better exposed. (c) The Calabar District. The Benin Sands in the neighbourhood of Calabar vary con-siderably in composition. Near the ferry on the Kwa Biver,en route to Calabar, a section is exposed at the side of the patha few hundred yards from the river. We have here a reddish,somewhat argillaceous sand, showing no sign of stratific

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