Table of Contents - SPE290: The Ordovician Deicke and Millbrig K-bentonite Beds of the Cincinnati Arch and Southern Valley and Ridge Province
Abstract
Introduction and Purpose
Methods
Geologic Setting
Petrography
Clay Mineralogy
Mixed-Layer Illite/Smectite
Other Clays
Color
Petrology and Petrogenesis
Introduction
Nature of the Original Ashes
Volume and Areal Extent of the Original Ashes
Setting of the Source Volcanoes
Is the Millbrig the "Big Bentonite" of Kinnekulle?
Diagenesis
Introduction
Feldspars
Clay Minerals
Fe and Fe-Ti Minerals
Discussion
Summary of Burial History
Stratigraphy and Correlation
Introduction
Absolute Age of the Deicke and Millbrig
The Rocklandian: Middle or Late Ordovician?
Correlation Along the Cincinnati Arch
Previous Studies
Discussion
Correlation from the Cincinnati Arch to the Valley and Ridge
Previous Studies
Discussion
Correlation Along Strike in the Valley and Ridge
Previous Studies
Discussion
Correlation Across Strike in the Valley and Ridge
Previous Studies
Discussion
Stratigraphic Value of the Deicke and Millbrig
Introduction
Sequence Stratigraphy and Unconformities
Comparison of K-Bentonite Lithostratigraphy with Conodont Biostratigraphy
Summary and Conclusions
Acknowledgments
Appendix 1: Sample Locality Information and Analytical Methods
References Cited