FAUNAL RELATIONSHIPS OF THE MEGANOS GROUP 149 
done before this section is known in detail, enough data were 
obtained to show conclusively that both Meganos and Tejon 
are present. The portion of the Eocene outcrops studied extends 
from San Emigdeo Canyon east to Live Oak Canyon, the latter 
being the first canyon to the east of Grape Vine Canyon (see 
map on p. 151). ! 
Faunal evidence for presence of Meganos.—Just to the east of 
San Emigdeo Canyon fossiliferous beds were found near the base 
of the section not far above the granite, and from these beds a 
good Meganos fauna was obtained. ~ 
The following is the list of species from this locality: 
Cardium, n. sp. — Amauropsis alveata Conrad 
Cardium cf. marysvillensis Dickerson Calypiraea cf. excentrica 
Glycimeris, sp. (?) Natica hannibali Dickerson 
Leda fresnoensis Dickerson Rimella, n. sp. 
Meretrix, n. sp. Turritella, n. sp. 
Psammobia, n. sp. Scaphander, n. sp. 
Tellina, n. sp. Seraps erratica (Cooper) 
Venericardia, n. sp. 
This fauna contains several of the distinctive forms of the 
Meganos, such as Leda fresnoensis Dickerson, Venericardia n. sp., 
Rimella n. sp., Natica hannibali Dickerson, Turritella n. sp. Prob- 
ably the most distinctive species in this fauna is the Rimella 
n. sp., which is very common in beds of the Meganos from Mount 
Diablo to southern California. 
Unconformity.—These fossiliferous Meganos beds were found 
to rest unconformably below others containing a typical Tejon 
fauna, the latter connecting directly with the outcrops of the 
typical Tejon of Grape Vine Canyon. 
One of the localities where the unconformable contact between 
the Meganos and the Tejon may be seen distinctly is about one- 
eighth of a mile back of the old Douglas ranch-house in the main 
canyon of San Emigdeo Creek.‘ Here the contact is beautifully 
exposed on the side of the canyon. There is a difference in dip 
between the two series of as much as 10° A basal conglomerate 
containing fossiliferous bowlders derived from the beds below was 
t Near south edge of NW. i, Sec. 5, T. 9 N., R. 21 W. 
