148 GEOLOGT. 



C talcschiste 



2. Terrains mtermddiaires T, inftrieur ou phyUadique < phyllade 



/ syenite 



I ( diorite 



3. Terrains secondaires . T" -'^''-^- i a.pMboUte, &c. 



' T. oolitique 



/■ T. sddimentaires . , . . gres, &c, 



4. Terrains tertiaires. . \ ^'"'^^^ ^.""^^ ^^^^ 1"^ ) trachytes 



^ appartiennent aux ter- > y^^^i^,^ 



C rains tertiaires . . . . ' 



5. Terrains modemes." 



The oolitic rocks of this table are the limestones near 

 Chelikot and Antalo, and the sedimentary tertiary beds 

 the sandstones of Tigr^ described below as the Adigrat 

 sandstones, to which I assign a much earlier geological 

 age — but they are not fossiliferous. 



Messrs. Ferret and Galinier also consider that there is 

 e\ddence of the existence of rocks of carboniferous, tri- 

 assic, and cretaceous age in Abyssinia ; the existence of 

 the first being proved by the presence of coal, and that 

 of triassic rocks by the occurrence of rock-salt and 

 sulphur in the country between the highlands and the 

 Eed Sea. The indications of beds of cretaceous age are 

 considered as very vague ; but the travellers are inclined 

 to attribute certain rocks in Shoa, described by M. 

 Eocher d'H^ricourt, to this series. The evidence in these 

 three cases would not be deemed sufficient in the present 

 day to prove the presence of the formations supposed 

 to occur. 



I have classed together the whole of the crystalline 

 and sub-crystalline rocks, attributed by Messrs. Ferret 

 and Galinier to primary, intermediate, and carboniferous, 



