LOWER CRETACEOUS DEPOSITS CALIFORNIA AND OREGON

CONTENTS
Page
ITFTHONCCTXOK AJFD ACKNOWLEDGMENTS- 1
Past I. STRtrcrcrjui AND Sravri&RAFHY, 5
Cretaceous embaymanta........... 5
General statement . » 5
Oregon embiiymeiits 6
Southern coastal emb&ymeata 6
Great Valley embayments — 7
Doubtful areas 8
Interrelation of troughs 0
Enclosing load areas.
General statement.
—
-
\ - — ... 11
U
Mohavia. 12
Salinia 12
Klamatbonia. 13
Other land areas. 16
Cretaceotu deposits in the Great Valley 17
Embayments of the trough '8
General statement. 18
Joaquin embayment — - 18
General statement - - -
Sources of sediment — 20
Sacramento embayment- 21
Cretaceous deposits. — , 21
General statement. 21
Volume oi sediment 23
Structures. - - - • • 24
Character of deposits,..... 25
Summary of atrata - 20
Conditions of deposition - •
Limits of subsidence 27
Sources of sediments — - 27
The Klamath peneplain ,,,,.,.. 29
Yolla Bolly basin 29
Yolla Bolly delta
Embayment currents. - 30
Cretaceous sedimentary divisions - 37
General statement. 37
Shasta series. ........ — - — 37
General statement "
Relations of the Shasta series — .. — 3®
Stratigraphic groups * 141
Paskenta group * *1
General statement 41
TyjM district fl
Faunal zones — • • 43
r
31