THE STRATIGRAPHIC AND FAUNAL RELATIONSHIPS 
OF THE MEGANOS GROUP, MIDDLE 
EOCENE OF CALIFORNIA 
BRUCE L. CLARK 
University of California 
CONTENTS 
INTRODUCTION 
HISTORICAL SKETCH 
PURPOSE OF PAPER 
THE MEGANOS GROUP IN THE VICINITY OF Mount DIABLO 
Meganos to the North of Mount Diablo 
Stratigraphy and Lithology 
Summary of Lithology of Section 
Evidence for Unconformity between Meganos and Tejon Fauna 
from Meganos Beds 
Comparison of Meganos and Tejon Faunas 
Meganos to South and Southeast of Mount Diablo Section Near East 
Edge of Concord Quadrangle 
Lithology 
Eocene Section to Southeast of Mount Diablo 
Faunal Zones 
Correlation 
EOCENE SECTIONS IN SOUTHERN PART OF CALIFORNIA IN WHICH MEGANOs Is 
REPRESENTED 
The Eocene Section North of Coalinga 
Unconformity 
Fauna 
Correlation 
Meganos at the South End of the San Joaquin Valley 
General Statement 
Area Studied 
Faunal Evidence for Presence of Meganos 
Unconformity 
Lithology 
- Fauna of Type Tejon 
Eocene of Camulos Quadrangle 
General Remarks 
Lithology 
Unconformity 
Fauna 
Correlation 
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