IN THE ANGLO-PARIS BASIN 7 



Jukes-Browne and it is unnecessary to repeat it here. Jukes-Browne's memoir 

 included almost all the stratigraphical information then available obtained either by 

 earlier workers, or by himself and William Hill for the Geological Survey. He 

 provided a good picture of the stratigraphy of the Albian in England, and extended 

 his study to make a brief examination of the Paris Basin. The accuracy of some of 

 his and Hill's field observations can still be demonstrated, and their reading of 

 certain sections now long since vanished can be interpreted in the light of recent 

 information with reasonable confidence. 



The first part of Spath's Monograph appeared twenty-three years after the publica- 

 tion of Jukes-Browne's memoir, and it was completed over a period of twenty years. 

 Its coverage was not complete, however, a fact which it is important to bear in mind. 

 It consists of the description of ammonite faunas from the comparatively few localities 

 that Spath himself collected from, or that were represented in museum collections 

 upon which he largely worked. Other sections, although available during this 

 period, were not apparently collected from by him and so, important parts of the 

 ammonite fauna were not described. Nonetheless, this very important work pro- 

 vided the basis and stimulus for the detailed stratigraphic work that was carried out 

 during that period largely by officers of the Geological Survey, and the work that 

 has been carried out since. The final part, published in 1943, contains a useful 

 review of the stratigraphic work carried out in the period since 1900. Since the 

 completion of his Monograph, a great deal of new information has been obtained 

 about Albian sediments in England. Contributions to our knowledge have been 

 made by a number of authors, particularly by Casey and C. W. & E. V. Wright. 

 Their papers and many others are listed in the bibliography and are discussed in the 

 appropriate part of the text. 



In France, before Jukes-Browne's Memoir was published, Charles Barrois wrote 

 three important papers on the French Albian (1875a, 1875b, 1878) . These, in associa- 

 tion with d'Orbigny's Paleontologie Frangaise, provided a good picture of the strati- 

 graphy and fauna of the Albian deposits of the Paris Basin. Barrois followed 

 Hebert (e.g. 1875a) and others in including sediments, now classified as Upper Albian, 

 within the Cenomanian. It is significant to note that Barrois already appreciated 

 the magnitude of the break in the succession between what we now consider to be 

 Middle and Upper Albian deposits in areas of the Paris Basin some 50 years before 

 Kitchin & Pringle (1922a) recognised it in England. In his papers Barrois incorpor- 

 ated the results gained by earlier workers such as Michelin, Leymerie, Raulin, Buvig- 

 nier, Cornuel, Ebray, Hebert, Delatour, and others, and a comprehensive biblio- 

 graphy is given by him (1878 ; 230-238). English workers such as Hopkins (1845), 

 Topley (1868), Jukes-Browne & Hill (1896) and Jukes-Browne (1900) carried their 

 researches into France, the latter authors providing new information particularly 

 about the sequence in Normandy described previously by Lennier (1867). 



Much useful information was published in the period of 30 years which separated 

 Barrois' work from the publication of an important thesis by Jacob (1908). This 

 thesis greatly increased our knowledge of the Aptian and Albian stratigraphy of the 

 French Alpine area and adjacent Switzerland, the site of the Morvano-Vosges strait. 

 In the following two decades, however, only a few papers were published. Of these, 



