SOD TES PING RTE NEOCERNE (OF CATETMORINIA 443 
yyy 
Series’’* in Humboldt county may be correlated with the Merced 
series. Thus the fauna reported from Kirker’s Pass and Green 
Valley, Contra Costa county, Santa Rosa and Russian River, 
Sonoma county, suggests the presence of the Merced series. 
The formation is fairly well developed at San Fernando, Los 
Angeles county. , 
Relations.—Near Santa Cruz the Merced series overlies con- 
formably the Monterey series; the two formations seem to grade 
into each other at the contact. At a number of places the Merced 
series lies directly upon the pre-Monterey formation. This may 
have been due either to transgression of the sea during the 
Merced period or to erosion during part of one or during both of 
these periods. 
Structure. —The end of the Monterey-Merced period was fol- 
lowed by the movement which elevated the Santa Cruz Moun- 
tains, making them again a prominent topographic feature. This 
movement was largely of the nature of faulting, and the largest 
fault noticed was the compound one, beginning at Mussel Rock 
and extending southeast nearly to Black Mountain. Many small 
faults were noticed; among these the one at Wood’s Gulch on 
Seven Mile Beach has a displacement of nearly goo feet. These 
faults have a strike of about southeast and northwest. Another 
group has the strike nearly due east and west. 
Asa rule the structure of the Merced and Monterey series 
shows only gentle folding, but locally, as on Seven Mile Beach 
and in that neighborhood, the dip becomes almost vertical. The 
structure along Seven Mile Beach reveals a great monocline, 
with the dip to the northeast. The other limb of the mono- 
cline is to the south in the long exposure at Pillar Point. 
Thence southward the structure shows gentle undulations until 
Pescadero Creek is reached. At Point New Year and at Capi- 
tola synclines show the presence of the Transition beds of the 
Merced series. 
Correlation.—The Transition beds were principally noted 
along the coast from Spanishtown southward ; also near Stanford 
tUniv. of Cal., Bull. Dept. Geol., I., 255. 
