1869.] 



COQIJAND CRETACEOUS STRATA. 



241 



MIDDLE CEETACEOUS. 

 1st. Gault, with Aiwm. cristatus, lautus, Baulinianus 22 meti-es. 



(. 



2nd. E/botomagian ^ 

 stage. 



Lower 

 beds 



Upper 

 beds 



3rd. 



witb Amm.auritus,planulatus, ros 

 tratus, Tecten asper, &c. ; (" Etage 

 Uraeonien" of M. Renevier; Cam- 



bridge Grreensand) 35 



/'with Turrilites costatus, tuhercu- 



latuSy Bergeri, Puzosiamcs, Sca- 



pkites csqualis, AmTnonites Man- 



telli, rhotomagensis, varians, 



sulcatus, Mayorianus, Velledce, 



Eenauxianus, Belemnites ultimus, 



Janira quinquecostata, Avellana 



y cassis, and Radiolites Mortoni ... 40 



This stage corresponds to the upper greensand and the 



chalk marl. 



Gardonian stage, chalk-marl beds of fluvio-marine origin, 



with Cyrena, Potamides, and Ostrea vardonensis, Coq., 



containing several beds of lignite, which are worked in 



the Departments of the Gard and Yaucluse 75 



/ 



4th. 



5th. 

 6th. 

 7th. 



Carentonian 

 stasre 



Lower 

 portion 



Upper 

 portion 



40 



160 

 60 



'with Sphcsrulites foliax:eus, Ca- 



prina adversa, Ostrea flabella, 0. 



hiauriculata, and Heterodiadema 



libycum (wanting in England).. 



with Inoc. labiatus, Amm. per- 



amplus, A. Woollgari (Mant.), 



A. navicularis, A. rusticus, and 



Hemiaster Verneuili, Desml. ... 



Angoumian stage, compact limestones, with Hipp. Eequie- 



nianus, and Radiol, cornu-pastoris (wanting in England) 



Mornasian stage, alternate clays and sandstones, with Amm. 



i?e2'W2e««awws (wanting in England) 250 ,, 



Provencian stage, compact limestone, with layers entirely 

 composed of Hipp, organisans, H. cor^iu-vaccinum, Sphce- 

 rulites Sauvagesii, 8. Besmoulinsii, and Caprina Coqiian- 

 diana, La Cadiere, Martigues ; base of the chalk of Gosau ; 

 wanting in England) 120 „ 



802 „ 



Notwithstanding some very striking points of resemblance between 

 the middle chalk of the two Charentes and that of the south of 

 Provence, we find that the latter differs from the former in many- 

 important particulars. In the first place, it possesses the stages of 

 the gault and upper greensand, which are wanting in the other ; 

 further, the beds with Inoceramus labiatus are more than 500 feet 

 in thickness ; and, lastly, between the Angoumian and Provencian 

 stages there intervenes, especially in the Department of the Bouches- 

 du-Rhone (between La Cadiere and La Ciotat), a stratum of sand- 

 stone of which there are no traces in the Departments of the south- 

 west, and which is remarkably rich in fossils in the Communes of 

 Uchaux and Mornas. But the most important modifications must 

 be made in the upper chalk, which is subdivided in the following 

 manner : — 



THE UPPER CRETACEOUS. 



1st. Coniacian stage : Eerruginous sandstone, with Ostrea auri- 

 cularis (Brong.) in the neighbourhood of Piolenc. 



