|
Reference
|
| Occurrence(s) |
| No. |
Group |
|
Name |
Qty |
Notes |
| 1 |
Tabulate Corals |
|
Catenipora sp. |
|
|
| 2 |
Rugose Corals |
|
Simple rugose coral |
|
|
|
|
| Title: |
Report on Referred Fossils
,
1980
(01/21)
|
|
|
| Report by: |
J. Thomas Dutro
, Jr.
|
| Referred by: |
David M. Hopkins
|
|
|
|
| | Age: | Silurian (Silurian?) |
| Formation: | Gubik Formation - Flaxman Member (Flaxman Formation) |
|
|
|
|
|
| Comment: | In addition to the corals reported by Oliver (see report dated 11/8/78), this collection contains several other macrofossil fragments, the most striking of which is a large annulate cephalopod about 30 cm. long. It is slightly curved and tapers from about 5 cm in diameter near the living chamber to about 2.5 cm at the proximal end. This cephalopod is probably a dawsonoceratid, accoding to Rousseau Flower (personal commun. 1/80). This family is essentially limited to the Silurian, although questionable finds have come from latest Ordovician and Middle? Devonian beds. Taken with the occurrence of CATENIPORA reported by Oliver, the best estimate of age is Silurian, although a latest Ordovician age is possible. The other fossils present in the collection are indeterminate echinoderm ossicles, indeterminate brachiopod fragments and euomphalacean gastropods. There are Ordovicain and Silurian platform sequences in the Arctic in several places, but the nearest is the Katakturuk Formation which crops out in the Sadlerochit Mountains. The precise source of this boulder in the Flaxman Formation is not determinable from these few fossils. |
| Occurrence(s) |
| No. |
Group |
|
Name |
Qty |
Notes |
| 1 |
Cephalopods |
|
dawsonoceratid cephalopod |
|
|
| 2 |
Echinoderms |
|
indet. echinoderm ossicles |
|
|
| 3 |
Brachiopods |
|
indet. brachiopod fragments |
|
|
| 4 |
Snails |
|
euomphalacean gastropods |
|
|
|