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