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Inclusions of dark rock believed to be recrystallized volcanic material in diorite. Hugh Miller Inlet. Glacier Bay National Park and Preserve, Alaska.

Dates

Date Taken
1950

Summary

Glacier Bay National Park and Preserve, Alaska. Hugh Miller Inlet. Inclusions of dark rock believed to be recrystallized volcanic material in diorite. Relations of inclusions to diorite show that both active intrusion and replacement of dark rock by diorite have taken place. The dark inclusions probably represent later additions to the melt and, hence, are not so thoroughly "digested." Circa 1950. Figure 12 (upper photo), U.S. Geological Survey Bulletin 1121-K.

Contacts

Data Owner :
U.S. Geological Survey
Photographer :
Rossman, D.L.

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Identifiers

Type Scheme Key
name photoLibrary rdl00012
number photoLibrary 30121
batch photoLibrary batch47
number_in_book photoLibrary 12

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