312 T. Davidson — On the Geology of Nice. 



Tertiary Periob — continued. 



— Lower bed—'Fmfi blackish grey anthracitic sandstones, etc. Inc. 30 to 40 



deg. E. Discordance as above. Some branched Zoophytes, undetermin- 

 able. Loc. Garavent, east of Menton. 

 d. StTESsoNiEN, D'Orb. Plastic Clay (Mantell) upper bed. Plastic Parisian 

 Marls or London Clay. Inc. 40 to 50 deg. E. Discordance with Cre- 

 taceous ; not rich in fossils. Rhizopodes, Goniaster, Orbiioides radians, 

 D'Arch. Loc. Villeneuye and Villafranche, near Nice. 



— Middle led — Arenaceous sandstone (Mantell) ; earthy Parisian limestone, 



crumbling when exposed to the air, etc. Inc. from 40 to 50 deg. E. ; 

 7 metres thick. Discordance as above ; tolerably rich in fossils. Turritella 

 imbricata, Lamk. Natica patula. Loc. Cagnes, PaUaree, Menton. 



— Lower bed — Eocene (Lyell). Hydraulic limestone. Inc. 45 to 65 deg. S.E. ; 



15 metres thick. Discordance with the Cretaceous and Jurassic. Very rich 

 in fossils. Gasteropoda. Nautilus regalis, Fusus Roe, Ostrea fiabellula. 

 Loc. Beaulieu, Jarrier, Braus, Mortola. 



m. Cretaceous Period. 



Epoch. B. Danien Desor wanting. 

 Senonien, D'Orb. Argillaceous limestone. Upper led — White marls and grey 

 limestone, friable when exposed to the atmosphere. Inc. 50 to 60 deg. 

 N.E. ; 150 metres. Discordance -siith the Jurassic (throughout the whole 

 Cretaceous period) ; poor in fossils. Nautilus simplex, Sow. Scaphites 

 compressus. Loc. Mt. Gros, Mt. Maccaron, St. CecUe. 



— Lower bed — Compact marly limestone, of a greyish colour, crumbling on ex- 



posure. Inclination and thickness as above ; poor in fossils. Micraster cor- 

 anguinum, Ananchytes ovata. Loc. Mt. Gros, Mt. Einardiere Cantaron. 

 TuBONiEN, D'Orb. Lower Chalk-marl (Sow.) Upper bed — Greyish marly 

 limestone (Tuffau) with few siliceous grains. Inc. 60 to 70 deg. N.E. ; 70 

 metres thick; not rich in fossils. Ammonites peramplus, A. Woolgari. 

 Loc. Mt. Papaton, Mt. St. Catherine at Drap. 



— Lower bed — Marls with numerous sUiceous grains, either compact or friable. 



Inc. 60 to 70 deg. N.E. ; 230 metres thick; few fossils. Am. deverianus, 

 Janira quadri-costata. Loc. Mt. Gros, I'Abbadie, Ese, Drap, etc. 

 Cenomanien, D'Orb. Chalk-marl (Mantell). Upper bed — Grey bay coloured 

 plastic clay, with a small quantity of alumina, etc. Inc. 70 to 80 deg. N.E. ; 

 2 metres thick; poor in fossils. Nautilus elegans, Am. Bhothomagensis. 

 Loc. Mt. Gros, Col de Papaton, etc. 



— Median bed — Lead grey, compact schists with cleavage lines, breaking up into 



small parallelepedes. Inc. 70 to 80 N.E. ; 10 metres ; fossils few. Am. 

 varians, A. falcatus, Scaphites mqualis. Loc. Varnee, Vienne, Blausasque. 



— Lower bed — Whitish, compact marly limestone, veined with white spar. Inc. 



from 80 to 90 deg. N.E. ; 100 metres thick ; here Ammonites attain their 

 largest dimensions. Turrilites and Inoceramus. Biscoidea cylindriea, D. 

 tubuculus. Loc. Mt. Gros, Drap, Mt. Einardiere. 

 Aleien, D'Orb. Period A. Gault. Upper bed — ^Green siliceous marls (Glau- 

 conite), very friable. Inc. from 80 to 90 deg. N.W. ; 30 centimetres thick ; 

 very rich in fossils. Geratites Seneguieri, Am. deluci. Loc. Ese, Eayet, 

 Papaton, etc. 



— Lower bed- — Compact grey marly limestones with green siliceous grains of iron 



(Glauconite). Inc. 40 to 50 deg. N.W. ; 80 centimetres thick ; rich in 

 fossils. Amm. mammillatus, A. cristatus, Turr. catenatus. Loc. Laghet, 

 Papaton, Ese, Eayet. 



Aptien, D'Orb. Speeton Clay (Phillips). Upper bed — Greenish grey siliceous 

 friable marls, containing very little lime. Inc. 45 to 55 deg. N.W. ; 10 

 cent, in thickness; not very rich in fossils. Fucoids. Belemnites semi- 

 canaliculatus, Am. Matheroni. Loc. Sauree, Mt. Gros, Turbie, etc. 



. Lower bed — Compact, green, and blackish siliceous marly limestone. Inc. as 

 above ; 40 centimetres in thickness ; poor in fossils. Am. Guettardi, Toxaster 

 complanatus. Loc. St. Blaise, Eevel, Baus. 



