FAUNAL RELATIONSHIPS OF THE MEGANOS GROUP 165 
A number of the undescribed species from the Meganos of differ- 
ent localities appear to be closely related to Wilcox species, if 
not identical with them. The correlation of the Meganos Group 
of California with the Wilcox of the east is only tentatively pro- 
posed. It is very possible that when the faunas of the Meganos 
and the Tejon are better known our ideas as to the relative position 
of the different Eocene horizons on the West Coast will be consid- 
erably revised. 
SUMMARY OF CONCLUSIONS 
The Meganos Group, the newly recognized division in the 
Eocene of California, has a wide distribution throughout the 
Coast ranges of the state. These beds represent an epoch of 
deposition distinct from both the Martinez below and the Tejon 
above. At the end of Martinez times there were orogenic move- 
ments which caused the sea to be withdrawn from what is now 
the Coast range province. When the sea again came, during 
the Meganos epoch, into this general region, its area was con- 
siderably different from that of the previous epoch. Following 
the deposition of the Meganos deposits, crustal movements again 
caused the withdrawal of the sea from the Coast range region. 
These movements were general throughout the Coast ranges, and 
over wide areas the Meganos beds were folded, the deposits of the 
next epoch of deposition, the Tejon, being laid across the upturned 
and eroded edges of these folded beds. 
The Meganos of the Coast ranges belongs to the same epoch 
of deposition as the beds of the Siphonalia sutterensis zone, 
described and referred to as a part of the Ione formation by Dick- 
erson. Previously the Siphonalia sutterensis beds had been con- 
sidered to represent the uppermost Eocene of the West Coast. 
A fairly large well-preserved fauna has been obtained from 
the Meganos horizon. This is very distinct from that. of the 
Martinez (Lower Eocene). A few of the Meganos species are 
found in the Tejon. The fauna appears to be more closely related 
to the Tejon than to the Martinez, and is correlated provisionally 
with the Wilcox horizon of the Gulf and Atlantic Coast provinces. 
