GEOLOGY OF MAROCCO AND GEEAT ATLAS. 451 



At a distance the cliff has a massive rocky aspect due to the 

 vertical infiltration of tufaceous seams, which support the softer 

 beds and stand out in prominent masses. The cliffs continue 

 southwards to Saffi, where I obtained a small series of fossils 

 from the section represented in fig. 1, amongst which Mr. 

 Etheridge has determined Exogyra conica, Ostrea Leymerii, and 

 0. Boiossingaulti. He considers the beds to be of Neocomian 

 age. The hard band c is almost entirely made up of Exogyra 

 conica. 



I am indebted to the late Mr. Oarstensen, H.B.M. "Vice- 

 consul at Mogador, for a specimen of Ostrea Leymerii, brought 



Fig. 1. 



Surface Tufa. 





i C 



« M^ 



gj 



Compact grey 

 sandstone. 



Ferruginous 

 band. 



Sea-level. 



Clift Section, Saffl. 



to him by a Moor from Agadir, and obtained, at a height of 

 1,500 feet, on the flanks of the maritime termination of the 

 Great Atlas range, 160 mUes south of the Saffi section. 



Two or three miles south of Saffi another section occurs, 

 known as the ' Jew's Cliff; ' and from this Dr. Hooker, who 

 landed on his homeward voyage, obtained a few fossils, viz. 

 several undeterminable species of Pecten ; an Ostrea allied to 

 0. Virleti, and a scutelliform Echinus of an unknown type, 

 which Mr. Etheridge proposes to place under a new genus, and 

 names Rotuloidea fimhriata. All these Mr. Etheridge sup- 

 poses to be of Miocene age; and the 'Jew's Cliff' section may 

 probably give the key to the age of the beds of the Marocco 



gg2 



