) 



1 (4 University of California 



Publications. 



[ Geology 



MARTINEZ FAUNA NORTH OF MT. DIABLO. 





Ciylicliiici costcttd 



Chieo Martinez 



Tejon 



* 



III II 1 1 It III < W [II- 1 1 



* # 





Discoheli.r, sp. 



V 





Fusus, n. sp. ( '?) 



V 





Galerus excentricus 



t 





Heteroderma, sp. 



* v.- 





Lunatia fiorni 



t(») 





N eptu n ea mucron ata 



** 





Perissolax trim runt its 







Turritella infragrauulata 



Turritella pachecoensis 





*(?) 



Urosyca caudata 







SipJionalia lineata 



* * 





Surcula, n. sp. (a) 



Surcula, a. sp. ( h ) 



-X- -X- 





* Common. 



t Rare. 

 ** Characteristic. 

 V Unfixed. 



Tlic Tejon is composed of white to dull red sandstone, coal 

 strata in soft shales and sandstones, and a basal conglomerate, 

 with a general east-west strike and a dip of 25°-35° N. Unio ( t) 

 penultimus and a leaf of a palm were found in the coal strata. 

 Amauropsis alveata, Trocosmilia striata, Mario tuberculatus, 

 Tapes conradiana, and Turritella uvasana, were found above the 

 coal strata in white sandstone. 



RELATION OF MARTINEZ TO TEJON. 

 The evidence of relationship of the Martinez to the Tejon 

 formation is based (1) upon area! mapping of the beds contain- 

 ing characteristic faunas of these formations; (2) upon variation 

 of strike at the contact of these formations; (3) upon variation 

 in dip throughout the area studied; (4) upon the presence of a 

 conglomerate which marks a very decided change in sedimenta- 

 tion at the base of the Tejon. 



