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Reference
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| Title: |
Memorandum for J.B. Mertie, Jr.
,
1939
(02/08)
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[Note by R.B. Blodgett: memorandum found on p. 2813 of Alaskan Fossil Reports, v. 12 (1935-1947), kept in Tech. Data Archives office in Anchorage, Alaska--Request for Examination of Fossils form on p. 2811, Localities of Invertebrate submitted by J.B. Mertie, Jr. on p. 2812] Memorandum for J.B. Mertie, Jr. Thru: Chief, Alaskan Geologist
Geologist in Charge, Sec. Paleo. and Strat. Herewith is report on two collection of Upper Cambrian fossils recently submitted: .... Numbers in parenthesis following your collection numbers refer to entries in my register of collections. .... Josiah Bridge,
Geologist |
| Report by: |
Josiah Bridge
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| Referred by: |
J. B. Mertie
, Jr.
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| | Age: | Late Cambrian (late Late Cambrian (equivalent to some part of the Trempealeau)) |
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| Comment: | In your collection 38AMt29 there are three distinct types of rock - a very fine grained, almost lithographic limestone which carries a large trilobite, and which appears locally to grade to a coarsely crystalline variety carrying brachiopods and fragments of small trilobites. The third type is strongly oolitic and contains no fossil. This collection is definitely late Upper Cambrian and probably represents the same horizon that furnished the collection described by Kobayashi. The Briscoia listed above is distinct from any of the forms which he described. The species referred to Acrotreta is probably the same as the one which he called A. curvata, but I have no means of proving it. The horizon would be equivalent to some part of the Trempealeau of the Upper Mississippi Valley section. |
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