Reference Detail of

Report on Referred Fossils
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Stratigraphic range: Cretaceous-Tertiary
Kinds of fossils: Plant
Quadrangle or area: Healy C-4, D-4, D-5, Healy 1:250,000; Fairbanks A-3, A-4
Shipment No.: A-55-6
Referred by: Wahrhaftig, Clyde
Report prepared by: Brown, Roland W.
Date: 05/20/1955


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Brief statement of problem and remarks (from collector):
Plant fossils from section of continental Tertiary rocks. Wish to correlate with Tertiary succession in Matanuska valley, Kenai coal field, and marine Tertiary rocks of Yakataga area.

Fossils submitted for use of R.W. Brown in connection with his proposed trip to Alaska this coming summer. [from Wahrhaftig transmittal sheet dated May 2, 1955]

Exact age and environmental significance of Cantwell formation. In particular evidence from fossils to confirm or deny that small patch of Cantwell? resting on granite from which 54-AWg-256 came, correlates with the rest of the Cantwell.

Collection submitted for use of R.W. Brown in his trip to Alaska this summer. [from another transmittal sheet of Wahrhaftig dated May 2, 1955]
User Note module to be added
46Awg3 , Healy , Healy D-5 quad. (3.4, 3.7). Upper part of "Healy Creek" formation. (description from Brown 1955 E&R report) [Wahrhaftig's transmittal sheet provides following: Fld. notebook sta. A-71, Healy D-5 quad. (3.4, 3.7). Upper part of "Healy Creek" formation.]
Alnus corylina Knowlton and Cockerell
Juglans nigella Heer
Carbonized coniferous wood
46Awg16 , Healy , Healy D-5 quad. (1.9, 11.1). Near base of Nenana gravel. (description for Brown 1955 E&R report) [Wahrhaftig's transmittal sheet of 5/2/55 provides following: Field notebook sta. A-172. Healy D-5 quad. (1.9, 11.1). Near base of Nenana gravel.]
Picea cones (spruce)
46AWg46 , Healy , Pl. 24 of Bull. 963-E (9.3, 4.6). Upper part of "Healy Creek formation" (description from Brown 1955 E&R report) [Wahrhaftig's transmittal sheet provides following: Field notebook sta. A-230. Pl. 24 of Bull. 963-E (9.3, 4.6). Upper part of "Healy Creek formation".]
Betula sp. (seed)
48Awg43 , Fairbanks , Fairbanks A-4 quad. (5.0, 3.9). Base of Nenana gravel. (description from Brown 1955 E&R report) [Wahrhaftig's transmittal sheet provides following: Field notebook sta. D-238. Fairbanks A-4 quad. (5.0, 3.9). Base of Nenana Gravel.]
Carbonized wood, not identified
48AWg45 , Fairbanks , Fairbanks A-4 quad. (4.4, 3.9). Near top of "Lignite Creek formation" (description from Brown 1955 E&R report) [Wahrhaftig's transmittal sheet provides following: Field notebook sta. D-240. Fairbanks A-4 quad. (4.4, 3.9). Near top of "Lignite Creek formation".]
fragments of Alnus corylina Knowlton and Cockerell
49Awg5 , Fairbanks , Fairbanks A-4 quad. (8.8, 9.7). "Healy Creek formation". (description from Brown 1955 E&R report) [Wahrhaftig's transmittal sheet provides following: Field notebook sta. K-59. Fairbanks A-4 quad. (8.8, 9.7). "Healy Creek formation".
Metasequoia occidentalis (Newberry) Chaney
49Awg6 , Fairbanks , Fairbanks A-4 quad. (7.9, 7.2). Base of "Sanctuary formation", 5 ft. above top of "F" bed. (description from Brown 1955 E&R report) [Wahrhaftig's transmittal sheet provides the following: Field notebook sta. K-62. Fairbanks A-4 quad. (7.9, 7.2). Base of "Sanctuary formation", 5 ft. above top of "F" bed.]
Metasequoia occidentalis (Newberry) Chaney
49Awg7 , Fairbanks , Fairbanks A-4 quad. (8.5, 6.7). Base of "Sanctuary formation", on ridge north of "Red" Creek. (description from Brown 1955 E&R report) [Wahrhaftig's transmittal sheet provides the following: Fairbanks A-4 quad. (8.5, 6.7). Base of "Sanctuary formation".]
Slickenside clay "galls". Inorganic
50Awg42 , Fairbanks , Fairbanks A-3 quad. (11.8, 0.6). "Suntrana formation". (description from Brown 1955 E&R report) [Wahrhaftig's transmittal sheet provides the following: Field notebook sta. L-129. Fairbanks A-3 quad. (11.8, 0.6). "Suntrana formation".]
Metasequoia occidentalis (Newberry) Chaney
Slickenside clay "galls". Inorganic
52Awg117 , Healy , Healy C-4 quad. (13.1, 16.8) 2800 feet above base of Cantwell formation, in sequence unconformable above clastic sedimentary portion of the Cantwell formation. S. side of Moody. (description from Brown 1955 E&R report) [Wahrhaftig's transmittal sheet provides following: Field notebook sta. P-248. Healy C-4 quad. (13.1, 16.8) @ 2800 ft. above base of Cantwell formation, in section of alternating tuffs and basalt flows which may lie unconformably over the clastic sedimentary portion of the Cantwell fm.]
fragments of a coniferous twig, having the appearance of Sequoia reichenbachi (Geinitz) Heer
52Awg180 , Healy , Healy C-4 quad. (4.2, 0.3). Float, probably out of Clear Cr. canyon. (description from Brown 1955 E&R report) [Wahrhaftig's transmittal sheet provides following: Healy C-4 quad. (4.2, 0.3). Float, probably out of Clear Creek canyon, hence on lower 2,000 feet of Cantwell formation on south side of synclinorium.]
Fragments of dicotyledonous leaves, not identifiable.
54Awg160 , Healy , Healy D-3 quad. (13.2, 0.7). At base of Cantwell formation. (description from Brown 1955 E&R report) [Wahrhaftig's transmittal sheet provides following: Notebooks sta. R-491. Healy D-3 quad. (13.2, 0.7). At base of Cantwell formation.]
Nilssonia yukonensis Hollick
Podozamites lanceolatus (Lindley and Hutton) Braun
Gingko laramiensis Ward
Cephalotaxopsis heterophylla Hollick
Cercidiphyllum ellipticum (Newberry) Brown
Magnolia palaeauriculata Hollick
Fragments of other dicotyledonous leaves
54Awg166 , Healy , Healy (17.3, 13.0). At base of Cantwell formation. (description from Brown 1955 E&R report) [Wahrhaftig's transmittal sheet provides following: Field notebook sta. R-512. Healy (1:250,000). (17.3, 13.0). At base of Cantwell formation.]
Cladophlebis browniana infirma Hollick
Cephalotaxopsis heterophylla Hollick
54Awg256 , Healy , Healy (18.8, 13.2). About 100 feet above base of the Cantwell(?) formation. (description from Brown 1955 E&R report) [Wahrhaftig's transmittal sheet provides the following: Field notebook station R-666. Healy (1:250,000). (18.8, 13.2). About 100 feet above base of Cantwell(?) formation. The main question to be answered by this collection is, "Is this likely to be from the same formation as the above two collections, and if not, can we assert that it is Cretaceous, at any rate?" this collection from an isolated body of sandstone and conglomerate, on the strike of a syncline in the Cantwell, and similar to it lithologically. It rests unconformable on a granodiorite batholith, one of several in the Alaska Range, which have previously been reported to be post-Cantwell. Nowhere else in the Alaska Range has the Cantwell formation been observed in contact with granitic stocks.]
Coniferous twigs with faintly preserved leaves, but not identifiable
Dicotyledonous leaf fragment, not identifiable