02068.jpg
Chart showing geologic periods in last 60 million years;
1970;
Diagrams
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02074.jpg
Copy of diagram of caldera formation;
No date
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02075.jpg
Copy of first step in caldera formation from book;
1976;
Diagrams
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02076.jpg
Second step in formation of Yellowstone caldera;
1976;
Diagrams
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02077.jpg
Third step in formation of Yellowstone caldera;
1976;
Diagrams
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02078.jpg
Fourth step in formation of Yellowstone caldera;
1976;
Diagrams
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14906.jpg
Diagram of vegetation communities - changes in altitude;
No date
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15613.jpg
Yellowstone Hot Spot 16 million years ago;
August 1997;
Diagrams
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15614.jpg
Yellowstone Hot Spot 4-6 million years ago;
August 1997;
Diagrams
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15615.jpg
Yellowstone Hot Spot 0-2 million years ago;
August 1997;
Diagrams
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15616.jpg
How geysers work;
Underground thermal activity with geyser, Stage 1;
July 1997
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15617.jpg
How geysers work;
Underground thermal activity with geyser, Stage 2;
July 1997
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15618.jpg
How geysers work;
Underground thermal activity with geyser, Stage 3;
July 1997
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15899.jpg
Yellowstone Hot Spot Track;
November 1998;
Diagrams
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