Reference Detail of

Report on Referred Fossils
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Stratigraphic range: Late middle or early late Miocene
Kinds of fossils: Mollusks, echinoids, barnacle, plants
Quadrangle or area: Chignik A-6, C-2, Port Moller D-1 quads., Alaska
Shipment No.: A-80-7M
Referred by: Detterman, Robert L.
Report prepared by: Marincovich, Louie , Jr.
Date: 03/18/1980

This report deals with six collections of megafossils from the Bear Lake Formation on the Alaska Peninsula, southwestern Alaska, and it relates to Branch of Alaskan Geology AMRAP project 9310-01381. This report complements one I did on Bear Lake mollusks from R.L. Detterman on 12/20/78. Collections below made by Louie Marincovich.

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78AM8 (Cenozoic loc. M7327) , Port Moller , Type section of Bear Lake Formation, on southwest side of ridge about 2 miles east of Bear Lake, section 4, T. 49 S., R. 70 W., Port Moller (D-1) quadrangle; lat. 56 deg., 58 min. N., long. 160 deg., 07 min., W. This locality is the same as M1186 (upper horizon) given in Burk (1965, Geol. Soc. America Memoir 99). Locality M7327 is about 250 feet below top of stratigraphic section.
Spisula (Mactromeris) cf. S. (M.) albaria (Conrad, 1848)
Siliqua cf. S. oregonia Dall, 1909
Hiatella arctica (Linnaeus, 1767)
Macoma (Macoma) optiva Yokoyama, 1923
Macoma (Macoma) aff. M. (M.) astori Dall, 1909
Macoma incongrua (von Martens, 1865)
Macoma sp.
Tellina (Peronidia) protovenulosa Nomura, 1935
Chione (Securella) ensifera (Dall, 1909)
Chione (Securella) cf. C. (S.) ensifera (Dall, 1909)
Acila (Truncacila) empirensis Howe, 1922
Acila (Truncacila) sp.
Clinocardium cf. C. brooksi (Clark, 1932)
or Clinocardium ciliatum (Fabricius)
Felaniella parilis (Conrad, 1848)
Nuculana cf. N. pernula (Mueller, 1779)
Nuculana sp.
?Mytilus (Plicatomytilus) gratacapi Allison and Addicott, 1976
?Buccinum sp.
Polinices (Euspira) pallidus (Broderip and Sowerby, 1829)
Natica (Cryptonatica) clausa Broderip and Sowerby, 1829
Natica (Tectonatica) janthostoma Deshayes, 1839
Margarites (Pupillaria) sp.
Neptunea (Neptunea) lyrata altispira Gabb, 1869
?Neptunea sp.
?Mohnia sp.
Colus sp.
Crepidula cf. C. rostralis Dall, 1909
Crepidula princeps Conrad, 1856
sand dollar echinoids
worm (?) tubes
carbonized plant fragments
78AM9 (Cenozoic loc. M7328) , Port Moller , Type section of Bear Lake Formation, same stratigraphic section as M7327, above, but about 150 feet stratigraphically lower. This locality is the same as M1186 (lower horizon) in Burk (1965, Geol. Soc. America Memoir 99).
Mya (?Arenomya) elegans Eichwald, 1871
?Tellina (Peronidia) protovenulosa Nomura, 1935
Clinocardium nuttalli (Conrad, 1838)
Spisula sp.
?Pitar sp.
Nuculana sp.
Felaniella parilis (Conrad, 1848)
Cyclocardia sp.
Macoma (Macoma) aff. M. (M.) astori Dall, 1909
Yoldia sp.
Buccinum aff. B. castaneum Dall, 1877
Colus aff. C. spitzbergensis (Reeve, 1855)
?Colus sp.
carbonized plant fragments
78AM10 (Cenozoic loc. M7329) , Chignik , Outcrop of Bear Lake Formation on first big ridge south of Sandy Lake. Fossils were collected at base of exposed stratigraphic section.
Chione (Securella) cf. C. (S.) ensifera (Dall, 1909)
?Chione sp.
Chlamys (Swiftopecten) cosibensis (Yokoyama, 1911)
Fortipecten sp.
Cyclocardia cf. C. crassidens (Broderip and Sowerby, 1829)
Tellina (Peronidia) protovenulosa Nomura, 1935
?Spisula sp.
Mya (Mya) truncata Linnaeus, 1758
Indeterminate taxon
Neptunea (Neptunea) lyrata altispira Gabb, 1869
Beringius sp.
?Beringius sp.
?Buccinum sp.
78AM11 (Cenozoic loc. M7330) , Chignik , Same outcrop of Bear Lake Formation as locality M7329, above, but 50 to 100 feet stratigraphically higher in section.
Mya (Mya) truncata Linnaeus, 1758
78AM13 (Cenozoic loc. M7332) , Chignik , Outcrop of Bear Lake Formation along east side of Yellow Bluff Creek. Top and base of formation not exposed, locality is approximately at top of a prominent pale reddish brown 50 to 75-feet-thick sandstone bed and about 50 feet stratigraphically below a sandstone-conglomerate bed that holds up sharp ridges and forms very angular ridge-top spires, about half way between mountain tops and valley floor.
?Felaniella parilis (Conrad, 1848)
Fortipecten mollerensis MacNeil, 1967
Clinocardium sp.
Chione sp.
Acila (Truncacila) cf. A. (T.) empirensis Howe, 1922
?Hiatella arctica (Linnaeus, 1767)
Glycymeris cf. G. grewingki Dall, 1909
Cyclocardia sp.
Mya (?Arenomya) elegans Eichwald, 1871
Indeterminate taxon
Crepidula sp.
Indeterminate taxon
sand dollar echinoids
worm (?) tubes
78AM14 (Cenozoic loc. M7333) , Chignik , Same stratigraphic section as M7332, above, but about 15 m. stratigraphically higher in section.
Fortipecten mollerensis MacNeil, 1967
Siliqua cf. S. oregonia Dall, 1909
Clinocardium sp.
Chione (Securella) cf. C. (S.) ensifera (Dall, 1909)
Cyclocardia sp.
Mya (?Arenomya) elegans Eichwald, 1871
Mya (Mya) truncata Linnaeus, 1758
Spisula sp.
Glycymeris sp.
?Beringius hertleini MacNeil, 1970
?Neptunea sp.
Naticid sp. indet.
sand dollar echinoid
barnacle