|
Reference
|
| Title: |
Report on Referred Fossils
,
1963
(10/03)
|
|
|
| Report by: |
Mackenzie Gordon
, Jr.
|
| Referred by: |
Irv L. Tailleur
|
|
|
|
| | Age: | Meramecian (late Meramecian) |
| Formation: | Lisburne Group |
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| Comment: | Of four fossils in concretions only one is identifiable. A second coiled impression probably represents the same species but one cannot be sure. The large specimen exhibits some effects of crushing but is well enough preserved to show the subrectangular early whorls with fine spiral striae, oxycone shape of the final volution, 7 curved septa at the end of the phragmocone, and the gently bowed ovad growth striae of the living chamber of which about 1/2 volution is preserved. These characters identify it as Phacoceras, a genus known from the beds with Goniatites in the British Isles, Belgium, Germany, and Morocco. The British records of this genus appear to be all from the P1 zone, particularly from the upper part. German records are mostly for the IIIalpha and beta zones (= the British P1 zone) but at least one is from the III gamma zone (= the British P2 zone). I mention all this because in the United States our Meramec-Chester boundary within the Upper Mississippian is located approximately at the P1 - P2 zone boundary. Thus the goniatites of the Calico Bluff Formation are probably Chester in age and those of the Lisburne Limestone are Meramec in age. The beds with Phacoceras on a small south tributary of the Kukpuk River probably should be referred to the Lisburne Group, and are therefore considered to be late Meramec (Upper Mississippian) in age. This is, so far as I know, the first record of Phacoceras in this hemisphere. |
| Occurrence(s) |
| No. |
Group |
|
Name |
Qty |
Notes |
| 1 |
Nautiloids |
|
Phacoceras sp. |
|
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| 2 |
Nautiloids |
|
nautiloid, indet. |
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| 3 |
Plants |
|
petrified wood? |
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|
| Title: |
Reconnaissance geologic map of the De Long Mountains A-3 and B-3 quadrangles and parts of the A-4 and B-4 quadrangles, Alaska
,
1990
|
|
|
| Report by: |
C. F. Mayfield
,
Steven M. Curtis
,
Inyo Ellersieck
,
Irv L. Tailleur
|
|
|
|
| | Age: | Late Mississippian |
| Formation: | Kuna Formation (Kuna Formation (Pennsylvanian and Missippian), Picnic Creek Allochthon, Wulik sequence) |
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| Comment: | Fossil age: Late Mississippian
Map unit: lPMk2, Kuna Formation (Pennsylvanian and Mississippian) Picnic Creek Allochthon, Wulik sequence
Fossil type: Cephalopods - Identified by M. Gordon, Jr.
Collected by Irv L. Tailleur
Shown as locality 14 on Sheets 1 and 2. |
| Occurrence(s) |
| No. |
Group |
|
Name |
Qty |
Notes |
| 1 |
Cephalopods |
|
Cephalopods |
|
identified by M. Gordon, Jr. |
|