A revision of the ammonite faunas of the type Cenomanian. i. Introduction,ancyloceratina     

W.J. Kennedy  P. Juignet 《Cretaceous Research》1983,4(1):3-83

This paper forms the first part of a revision of the ammonite faunas of the Cenomanian stratotype in the environs of Le Mans, Sarthe, France. The history of research on ammonites in the area is briefly noted, as is the lithostratigraphy. The systematics of the heteromorph ammonites (Ancyloceratina) is described, and the following taxa documented: Hamites simplex d'Orbigny, Sciponoceras baculoides (Mantell), Sciponoceras gracile (Shumard), Anisoceras plicatile (J. Sowerby), A. aff. plicatile, Idiohamites alternatus vectensis Spath, I. ellipticus radiatus Spath, Hypoturrilites gravesianus (d'Orbigny), H. tuberculatus (Bosc), H. mantelli (Sharpe), H. sp., Neostlingoceras carcitanense (Matheron), N. aff. carcitanense, Turrilites costatus Lamarck, T. acutus Passy, T. scheuchzerianus (Bosc), T. boerssumensis Schlüter, Mariella dorsetensis (Spath), M. cenomanensis (Schlüter), M. group of cenomanensis (Schlüter)-lewesiensis (Spath), M. spp., M. (Plesioturrilites) sp., Scaphites equalis J. Sowerby, S. obliquus J. Sowerby, S.(?) sp., and S. sp. juv.  相似文献   

A revision of the ammonite faunas of the typeCenomanian. 2. The families Binneyitidae,Desmoceratidae, Engonoceratidae,Placenticeratidae, Hoplitidae,Schloenbachiidae, Lyelliceratidae and Forbesiceratidae     

W.J. Kennedy  P. Juignet 《Cretaceous Research》1984,5(2):93-161

In this part of the revision of the ammonite faunas of the type Cenomanianwe deal with representatives of the genera Borissiakoceras, Austiniceras, Neolobites, Metengonoceras, Placenticeras, Hyphoplites, Schloenbachia, Stoliczkaia (Lamnayella), Stoliczkaia (Shumarinaia), Euhystrichoceras and Forbesiceras.  相似文献   

Small valley bottom deposits in the sandy districts of the Sarthe basin (France): climatic and/or human origin?     

Jean Pierre Larue   《Geomorphology》2002,45(3-4)

The study of the small valley bottom deposits in a sandy district where several recent erosional events have occurred makes it possible to distinguish deposits, which are caused by climatic oscillations from those induced by both climate and human activities. The coarse alluvium with flints, which reached the main valleys prior to the Subboreal, was transported by greater flows than those which resulted from later human-induced flood discharges, where flints were not evacuated from the small valleys. Radiocarbon dates of peat set those deposits in the Iron Age, in the transition from Antiquity to the Medieval period, at the end of the “optimum climatique de l'an Mil” and during the Little Ice Age. At the present time, human-induced flood discharges reach again the main valleys.  相似文献   

Cenomanian ammonites from northern aquitaine     

P. Moreau  I.H. Francis  W.J. Kennedy 《Cretaceous Research》1983,4(4):317-339

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