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| Keywords: The Quarterly journal of the Geological Society of London (12961151215).jpg 1869 <br> COQUAND CEETACEOTJS STKATA <br> 245 <br> on the Geology of Constantine I have received from M Brossard <br> several unpublished species; and M Peron who has intelligently <br> explored the high plateaux of the provinces of Algiers and Constan- <br> tine has in his possession a great quantity of new materials which <br> he intends to make known and which must certainly he very im- <br> portant judging from the large quantities of Ostrece which I have <br> received from him for a publication upon which I am now engaged <br> In the chain of the Madonies in Sicily I was able to recognize the <br> Ehotomagian type of the environs of Tebessa represented by iden- <br> tical fossils of the same colour Ostrea syjphax Ostrea africana <br> Ostrea Overwegi Coq M Seguenza also discovered the Ehoto- <br> magian stage in the Province of Reggio in Calabria We know <br> that it exists in the Lebanon and in the desert which separates the <br> Dead Sea from the Eed Sea <br> From the foregoing details it appears that should we continue to <br> take the English divisions as a frame- work for the general divisions <br> of the chalk we shall find it insufficient to contain the enlarged <br> canvas <br> We have indeed seen that beyond the basin of Paris the chalk <br> of Mans is increased by a new stage the Carentonian the chalk of <br> the west by three stages the Angoumian Provencian and Dor- <br> donian and the chalk of Provence by the Mornasian stage <br> If we now endeavour to draw conclusions from the resemblance <br> or identity of the faunas we shall see that in addition to the fossils <br> which are common to all and which form useful landmarks in the <br> field of discovery each region possesses species peculiar to itself; <br> so that if we were to compare two extreme points as for example <br> Algeria and England without taking into account the intermediate <br> localities we should be so struck by the great dissimilarities as to <br> ask ourselves whether we are not comparing two diiferent formations <br> Fig 4 ” Section of the Cretaceous Beds of Algeria <br> Tebessa <br> Dj Osmer <br> Tenoukla <br> Jurassic <br> But if we compare Algeria with Provence Provence with the Cha- <br> rente the Charente with the Sarthe the Sarthe with Paris and <br> Paris with England we recognize without any surprise or shock <br> the connecting links which unite the scattered particles into a whole 36103090 111288 51125 Page 245 Text v 25 http //www biodiversitylibrary org/page/36103090 1869 Geological Society of London NameFound Ostrea NameConfirmed Ostrea EOLID 10719983 NameBankID 2692450 NameFound Ostrea africana NameConfirmed Ostrea africana NameFound Seguenza NameConfirmed Seguenza NameBankID 4340752 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 25 1869 Geology Periodicals Smithsonian Libraries bhl page 36103090 dc identifier http //biodiversitylibrary org/page/36103090 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-06 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12961151215 2015-08-26 15 55 38 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1869 Photos uploaded from Flickr by Fæ using a script | ||||
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