Ammonites from the Buchia zones in northwestern California and southwestern Oregon / by Ralph W. Imlay and David L. Jones.
Some Late Jurassic and Early Cretaceous ammonites date the Buchia zones and furnish correlations with the Boreal and Tethyan Realms.
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| Format: | Government Document Book |
| Language: | English |
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Washington :
U.S. Govt. Print. Off,
1970.
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| Series: | Jurassic (Tithonian) and Cretaceous Buchia zones in northwestern California and southwestern Oregon.
Geological Survey professional paper ; 647-B. |
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