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Graptolite identification chart for field determination of geologic age

Oil and Gas Investigation Chart 66

By:
and

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Abstract

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Graptolite identification chart for field determination of geologic age
Series title:
Oil and Gas Investigation Chart
Series number:
66
Edition:
-
Year Published:
1972
Language:
ENGLISH
Description:
1 map. 22 1/2 by 35 inches
Scale:
1000000