Report on Referred Fossils |
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| Stratigraphic range: |
Lower Jurassic |
| Kinds of fossils: |
Ammonites |
| Quadrangle or area: |
MCarthy B-4 |
| Shipment No.: |
A-68-14 |
| Referred by: |
MacKevett, E. M., Jr.
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| Report prepared by: |
Imlay, Ralph W.
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| Date: |
10/16/1968 |
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Brief statement of problem and remarks (from collector):
Enclosed are two fossil collections, 67AMk-143 and 67AWk-112, from the upper member of the McCarthy Formation in the McCarthy B-4 quadrangle. The locations of the collections are shown on the enclosed topographic map. I would appreciate it if you would examine the collections and report on them. I suspect they may indicate Hettangian, but possibly the material isn't good enough for identifications.
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| User Note module to be added |
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67AWK112
(Mesozoic loc. 29870)
, Mc Carthy
, from upper member of McCarthy Fm. in the McCarthy B-4 quadrangle (description from Imlay E&R report, 10/16/68) [E.M. MacKevett, Jr., 1967. On north side of Chitistone Mountain in east-central part of NE1/4NW1/4 sec. 27, T. 4 S., R. 16 E., McCarthy (B-4) quadrangle. Wrangell Mountains, southern Alaska. Upper member(?), McCarthy Formation, Hettangian. (from Imlay, 1981, p. 25)]; [Many localities in upper member of McCarthy Formation, in McCarthy C-4, C-5, and B-4, quadrangles, Wrangell Mountains, eastern Alaska (MacKevett, 1970a, b, 1971). Ammonites include Arietites (loc. 29870), Arnioceras (Iocs. 28535, 28536, 28538, 28688), Crucilobiceras (loc. 28537, 28540, 28671-73), and Microderoceras (loc. 14472). (description from Imlay and Detterman, 1973, p. 22)]; [USGS Mes. Cat.: Lower Jurassic. Orig. No. 67 AWK 112. Upper Member, East-central part NW 1/4/ NW1/4 sec. 27, T. 4 S., R. 16 E., McCarthy Bo-4 quad., on north side of Chitistone Mtns. Collector: Ed. M. Mackevett, 1967]; [Many localities in upper member of McCarthy Formation, in McCarthy C-4, C-5, and B-4, quadrangles, Wrangell Mountains, eastern Alaska (MacKevett, 1970a, b, 1971). Ammonites include Arietites (loc. 29870), Arnioceras (Iocs. 28535, 28536, 28538, 28688), Crucilobiceras (loc. 28537, 28540, 28671-73), and Microderoceras (loc. 14472). (description from Imlay and Detterman, 1973, p. 22)];[USGS Mes. Cat.: Lower Jurassic. Orig. No. 67 AWK 112. Upper Member, East-central part NW 1/4/ NW1/4 sec. 27, T. 4 S., R. 16 E., McCarthy B-4 quad., on north side of Chitistone Mtns. Collector: Ed. M. Mackevett, 1967]
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Arietites (identical with sp. described by Imlay in USGS Prof. Pap. 274-D, pl. 10, figs. 7, 8)
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fragments of ammonites suggestive of the subfamily Arietitinae
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67AMK143
, Mc Carthy
, from upper member of McCarthy Fm. in the McCarthy B-4 quadrangle (description from Imlay E&R report, 10/16/68)
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