Graptolite identification chart for field determination of geologic age
Oil and Gas Investigation Chart
66
By: Michael Churkin Jr. and Claire Carter
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- Plate: Plate 1 (pdf)
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Abstract
Suggested Citation
Churkin, M., Carter, C., 1972, Graptolite identification chart for field determination of geologic age: U.S. Geological Survey Oil and Gas Investigation Chart 66, 1 map. 22 1/2 by 35 inches, https://doi.org/10.3133/oc66.
| 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 |
| DOI | 10.3133/oc66 |
| Year Published | 1972 |
| Language | ENGLISH |
| Description | 1 map. 22 1/2 by 35 inches |
| Scale | 1000000 |