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Pliocene and Pleistocene Volcanic Ash

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Table of Contents

Abstract

Introduction

Petrography of Volcanic Ash

Composition

Particle size

Particle shape

Types of vesicles and inclusions

Degree of alteration

Color

Original composition of the ash

Particle size

Contamination by nonvolcanic material

Weathering and devitrification

Characteristics of Pliocene and Pleistocene Volcanic Ash

Stratigraphy

Sampling and laboratory procedure

Petrographic characteristics

Composition

Particle size

Particle shape

Types of vesicles and inclusions

Color

Degree of alteration

Specific gravity

Conclusions

References


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Kansas Geological Survey, Geology
Placed on web Aug. 10, 2007; originally published April 1946.
Comments to webadmin@kgs.ku.edu
The URL for this page is http://www.kgs.ku.edu/Publications/Bulletins/64_1/01_contents.html