286 



W. H. HOBBS — GUADIX FORMATION OF GRANADA, SPAIN 



and, as lie believed the beds to dip beneath those of notably different type 

 on which the Alhambra is built, be gave to the latter deposits the name 

 Alhambra formation. The Guadix formation is areally separate from 

 both the others, though partaking of the characters of each. The map 

 of the Spanish Geological Commission* shows the greater part of the 

 three formations as diluvial, and the resemblance of the Block formation 

 in particular to a glacial deposit is certainly most striking. Until the 

 writer had examined numerous localities he was compelled to adopt the 

 view that local glaciers from the Sierra Nevada had deposited the ma- 





if 



i €. J - / 



Figure 1. — -Map of the Guadix and -neighboring Formations. 



Modified from the map by the Spanish Geological Commission. The mass of 'ne 

 Sierra Nevada is composed of crystalline schists of Silurian or greater age. J, Jurassic ; 

 T, Triassic ; X, Neocene ; P, Pliocene ; G, Guadix formation. 



terial, and it appears that every geologist who has studied the district has 

 given prominence to a supposed glacial origin for the formation. Mo- 

 raines in the valley of the Genii were even described by Schimper.f 

 Bertrand and Kilian % state that the lower layer of the Block formation 

 at Talara contains calcareous pebbles which are polished and striated, 

 and they quote Taramelli and Mercalli as holding this opinion of a 



* Sheet no. 52, Granada, second edition. 



t Schimper : Voyage geologique botanique au Sud d'Espagne. 1849. 

 + Bertrand et Kilian : Eludes sur los terrains secondaires et tertiares dans les 

 provinces de Crenada et de Malaga. Mem. de l'Acad. de Sciences de l'lnstitut National 



de France, t. xxx, p. 520. 



