106 



University of California Publications in Geology [VOL. 8 



VI. SECTION NORTH OF MOUNT DIABLO 



Martinez 

 Eocene 



Feet 

 300 



(5) Gray-green shale 



(4) Gray-green, glauconitic sandstone 1 



Trochocyathus zitteli beds ( 



(3) Fine-grained, gray sandstone 200 



(2) Shales and sandstones 100 



(1) Brown, conglomeritic sandstone 



Meretrix dalli beds ... 



50 



Total .. 700 



SUMMARY OF MARTINEZ FAUNA 



The table given below indicates the occurrence and distribution of 

 the forms which are found in the Martinez. The local occurrence of 

 each species is given in the first major column and the range of the 

 species is indicated in the second. Three major faunal zones are 

 recognized in the Martinez : a lower, the Meretrix dalli zone ; a middle, 

 the Trochocyathus zitteli zone ; and an upper, the Solen stantoni zone. 

 The Meretrix dalli zone is typically represented in the Martinez north 

 of Mount Diablo, while the Trochocyathus zitteli and the Solen stan- 

 toni zones were first recognized at the type locality near Martinez. 

 The type locality may be regarded as the type locality of these last 

 two zones as well. The sections given above refer to their respective 

 columns in figure 5. 



LIST OF MARTINEZ SPECIES 



MARTINEZ LOCALITIES 



RANGE OF SPECIES 



