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Table of Contents - Special Paper 357

Nearshore Marine Paeoclimatic Regions, Increasing Zoogeographic Provinciality, Molluscan Extinctions, and Paleoshorelines, California: Late Oligocene (27 MA) to Late Pliocene (2.5 Ma)

By Clarence A. Hall, Jr.

ABSTRACT

INTRODUCTION

PROCEDURE
Assigning rock units to time slices
Taxonomy and latitudinal endpoints of taxa
Effective temperature
Paleoshorelines and paleoclimatic regions
Assignment of rock units to time slices
Molluscan stages
Biostratigraphic problems
27-23 Ma time slice
23-17 Ma time Slice
17-13 Ma time slice
13-8 Ma time slice
Taxonomy and latitudinal endpoints of taxa
Faunal lists
Taxonomy
Endpoints of geographic ranges and ecologic data of taxa
Effective temperature
Present-day molluscan and paleomolluscan provinces
Climatic regions
Continental climatic regions defined by temperature
Marine climatic regions defined by temperature
Effective temperature for fossil taxa
Percentage of fossil taxa with a particular effective temperature

PALEOSHORELINE MAPS AND PALEOCLIMATIC REGIONS

RESULTS

DISCUSSION
Role of temperature in limiting distribution of marine mollusks
Regional and global climatic changes
Late late Oligocene to late early Miocene time; time slices 27-23 Ma and 23-17 Ma
Late early Miocene to early medial Miocene time; time slice 17-13 Ma
Late medial Miocene to early late Miocene time; time slice 13-8 Ma
Late Miocene to early Pliocene time; time slice 8-5 Ma
Early to late Pliocene time; time slice 5-2.5 Ma
Pleistocene time; 1.6-0.01 Ma
Extralimital and extraprovincial or thermally anomalous molluscan taxa
Explanations for extraprovincial and thermally anomalous taxa
Sea-level oscillations
Regional extinction events
Survivorship of 1206 species, mostly molluscan taxa
Volcanism, climate, and extinctions
Temperate marine paleoclimate
Species diversity
Increasing species diversity through time
Present-day latitudinal, molluscan diversity gradients
Paleogeography

CONCLUSIONS

SUMMARY

ACKNOWLEDGMENTS

APPENDICES