Identifier: quarterlyjourna331877geol (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 Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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e whole soil indicates a stiff clay beneath. Indeedthe Corallian formation has died out, not gradually, but suddenly,and the normal pelolithic formation reigns supreme. In this range from Westbury to Wheatley the most remarkablefeature is the variety exhibited by this essentially variable set of beds,a good idea of which can scarcely be obtained by the aid of words,even though more details should be given. We therefore presenta generalized section (fig. 8) along a line following the range, withbeds at a moderate distance on either side projected on it; so that itmust be considered diagrammatic, and the thickness only approximate, 312 J. F. BLAKE AND W. H. HUDLESTON ON M o a • r-l r-l O -*-> rr> © 1—1 •!-H S hO tH £ co o i—i PI 00 ci • 1-1 o PI N! O - -fj o o w <^-i o PI O i—i S- o ^ s « H r-o i««o « rC !^ c3 ^ fl g <D •5 ,<© s^ o o o ^ s • 1—1 ■» ob © Si O 03 8 » oo
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*-V 1 THE CORALLIAN ROCKS OF ENGLAND. 313 As we indicated at the commencement, it is not our object in thispaper to correlate the various deposits described with what may betheir representative portions of the argillaceous series; but, for thesake of indicating the possibility of such a correlation, we may recordthe fact that at Ampthill, the place after which Mr. Seeley hascalled the middle division of the clay, we have found in the debrisof the railway-cutting a well-marked spine of that most characte-ristic Corallian fossil Cidaris jlorigemma, associated with Ammonitesplicatilis, Ostrea gregaria, and Serpula intestinalis. We do not propose either to enter into a complete discussion ofthe Els worth Rock of the same geologist, although we think thatit belongs to some portion of the time during which, elsewhere,Corallian rocks were being formed, and should probably be referredto a position analogous to that of the Lower Calcareous Grit. Thusmuch appears likely from the character of th

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