|
Reference
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| Title: |
Report on Referred Fossils
,
1967
(12/05)
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The only fossils of age significance in these collections are Buchia concentria (Sowerby) and B. rugosa (Fischer) whose ranges are known to you from earlier reports. The association of these species at loc. 67ADt1529 indicates a middle Kimmeridgian age. The occurrence of B. rugosa by iteself indicates a middle Kimmeridgian to early Portlandian age. Recent collections submitted by Standard Oil Co. of Calif. from the Staniukovitch Formation contain Buchia uncitoides (Pavlow) and B. crassicollis (Keserling) subspecies solida (Lahusen), which species are respectively of Berriasian and Valanginian ages. The identifications made by David Jones for C. A. Burk (1965, G.S.A. Mem. 99, p. 219) need rechecking because at the time Dave made those identifications he did not differentiate B. uncitoides from B. piochii (Gabb). As your collections do not contain anything resembling B. piochii or B. uncitoides, it seems doubtful that any part of the Naknek Formation in your map area is as young as the Staniukovitch Formation. |
| Report by: |
Ralph W. Imlay
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| Referred by: |
Robert L. Detterman
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| | Age: | Late Jurassic |
| Formation: | Naknek Formation |
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| Rock Type: | Primary: Clastics |
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| Occurrence(s) |
| No. |
Group |
|
Name |
Qty |
Notes |
| 1 |
Belemnites |
|
Belemnite guard undet. |
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