Alaska Paleontological Database

Reference Detail

Report on Referred Fossils

Stratigraphic range:

Pliocene

Kinds of fossils:

Mollusks

Quadrangle or area:

Trinity Islands B-3 and C-3 quads.

Shipment No.:

A-70-23M

Referred by:

Plafker, George

Report prepared by:

Addicott, Warren O.

Date:

12/09/1970

Collections upon which this report is based are from a 2,300-foot measured section of the Tugidak Formation. The base of the measured section is at the extreme southwest end of the island; the top of the section is near the middle of the northwest coast of the island. This material supplements three earlier collections from Tugidak made by George Moore during 1962 and 1963. These collections were identified by F.S. MacNeil (A-62-8M and A-63-44M). Moore's stratigraphically lowest collection (M1493) is equivalent to M4393 of this report, his intermediate collection (M1895) is equivalent to M4401, and his stratigraphically highest collection is from the (M1494) stratigraphical interval between M4402 and M4403 of this report.

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70APr 81 (Cenozoic loc. M4392) , Trinity Islands , Southwest end of Tugidak Island about 230-260 ft stratigraphically above the base of a 2,300-foot measured section. Tugidak Formation. (description from Addicott E&R report of Dec. 9, 1970)

Admete couthouyi (Jay)

Aforia circinata (Dall)

Buccinum aff. B. phemingus Dall

Cryptonatica sp.

Neptunea n. sp. aff. N. lyrata (Gmelin) and .....

......... N. pribiloffensis (Dall) - weakly sculptured form

Undetermined fragment

Astarte aff. A. undata Gould

Chlamys (Leochlamys) tugidakensis MacNeil

Cyclocardia crassidens (Broderip and Sowerby)

Cyclocardia crebricostata (Krause)

Hiatella arctica (Linne)

Macoma calcarea (Gmelin)

Macoma sp.

Musculus nigra (Gray)

Mya truncata Linne

Undetermined fragment

Hemithyris psittacea Gmelin

70APr 82 (Cenozoic loc. M4393) , Trinity Islands , Southwest end of Tugidak Island from a stratigraphic interval about 460-580 feet above the base of a 2,300-foot measured section. Tugidak Formation. Approximately same as M1493. (from Addicott E&R report of Dec. 9, 1970)

Cryptonatica clausa (Broderip and Sowerby)

Fusitriton oregonensis (Redfield)--immature specimen

Latisipho halli (Dall)

Neptunea n. sp. aff. N. lyrata (Gmelin) and ....

........ and N. pribiloffensis (Dall)--weakly sculptured form

Oenopota cf. O. harpa (Dall)

Oenopota sp.

Tachyrhynchus cf. T. erosum (Couthouy)

Tachyrhynchus cf. T. reticulatum (Mighels)

Macoma brota lipara Dall

Nucula tenuis (Montagu)

Nuculana cf. N. pernula (Mueller)

Panomya arctica Lamarck

70APr 83 (Cenozoic loc. M4394) , Trinity Islands , Southwest end of Tugidak Island from a stratigraphic interval about 580-610 feet above the base of 2,300-foot measured section. Tugidak Formation. (from Addicott E&R report of Dec. 9, 1970)

Aforia circinata (Dall)

Cryptonatica clausa (Broderip and Sowerby)

Epitonium aff. E.(Boreoscala) greenlandicum (Perry)

Rectiplanes?

70APr 85 (Cenozoic loc. M4395) , Trinity Islands , Southwest end of Tugidak Island from a stratigraphic position about 960 feet above the base of a 2,300-foot measured section. Tugidak Formation. (from Addicott E&R report of Dec. 9, 1970)

Cryptonatica clausa (Broderip and Sowerby)

Latisipho cf. L. errones (Dall)

Neptunea sp.--juvenile specimen

Polinices pallida (Broderip and Sowerby)

Tachyrhynchus reticulatum (Mighels)

Trophonopsis sp.

Undetermined minute specimen

Cyclocardia cf. C. crebricostata (Krause)

Macoma sp.--fragment

Panomya sp.--fragment

70APr87 (Cenozoic loc. M4391) , Trinity Islands , Southwest end of Tugidak Island from about 1,100 feet above the base of a 2,300-foot section. Tugidak Formation. (from Addicott E&R report of Dec. 9, 1970)

Latisipho sp.

Polinices pallida (Broderip and Sowerby)

Oenopota cf. O. nobilis (Moeller)

Mya truncata Linne

70APr88 (Cenozoic loc. M4396) , Trinity Islands , Southwest end of Tugidak Island from a stratigraphic interval about 1,100-1,240 feet above the base of a 2,300-foot measured section. (from Addicott E&R report of Dec. 9, 1970)

Admete couthouyi (Jay)

Buccinum sp.--fragment

Neptunea n. sp. aff. N. lyrata (Gmelin) and ....

........ N. pribiloffensis (Dall)--weakly scultpured form

Oenopota sp.

Polinices pallida (Broderip and Sowerby)

Trophonopsis cf. T. clathratus Linne

Volutopsius sp.--fragment

70APr 89 (Cenozoic loc. M4397) , Trinity Islands , Southwest end of Tugidak Island from a stratigraphic interval about 1,240-1,370 feet above the base of a 2,300-foot measured section. Tugidak Formation. (from Addicott E&R report of Dec. 9, 1970)

Naticid--fragment

Clinocardium cf. C. ciliatum (Fabricius)

Hiatella arctica (Linnaeus)

Serripes groenlandicus (Bruguiere)

70APr90 (Cenozoic loc. M4398) , Trinity Islands , Southwest end of Tugidak Island from a stratigraphic interval about 1,370-1,410 feet above the base of a 2,300-foot measured section. Tugidak Formation. (from Addicott E&R report of Dec. 9, 1970)

Neptunea n. sp. aff. N. lyrata (Gmelin) and ...

... N. pribiloffensis (Dall)--strongly sculptured form

70APr 91 (Cenozoic loc. M4399) , Trinity Islands , Southwest end of Tugidak Island from a stratigraphic interval about 1,410-1,540 feet above the base of a 2,300-foot measured section. Tugidak Formation. (from Addicott E&R report of Dec. 9, 1970)

Naticid

Neptunea n. sp. aff. N. lyrata (Gmelin) and .....

.....N. pribiloffensis (Dall)--weakly sculptured form

Clinocardium ciliatum (Fabricius)

Macoma calcarea (Gmelin)

Macoma cf. M. incongrua von Martens

Musculus nigra (Gray)

Mya truncata (Linnaeus)

Pododesmus macroschisma (Deshayes)

Serripes groenlandicus (Bruguiere)

70APr91 (Cenozoic loc. M4400) , Trinity Islands , Southwest end of Tugidak Isalnd from a stratigraphic interval about 1,410-1,540 feet above the base of a 2,300-foot measured section. Tugidak Formation (from Addicott E&R report of Dec. 9, 1970)

Chlamys (Leochlamys) tugidakensis MacNeil

Chlamys cf. C. hanaishiensis Masuda

70APr92 (Cenozoic loc. M4401) , Trinity Islands , Near southern end of northwest coast of Tugidak Island from a stratigraphic interval about 1,540-1,580 feet above the base of a 2,300-foot measured section. Tugidak Formation. Same locality as M1895. (from Addicott E&R report of Dec. 9, 1970)

Cryptonatica clausa (Broderip and Sowerby)

Plicifusus aff. P. brunneus (Dall)

Puncturella cf. P. longifissa Dall

Tachyrhynchus erosum (Couthouy)

Turritellopsis acicula (Stimpson)

Chlamys islandica kanagae MacNeil

Chlamys pilicaensis Kubota [= C. coatsi middletonensis MacNeil]

Chlamys trinitensis MacNeil

Diplodonta sp.

Macoma cf. M. calcarea (Gmelin)

Macoma brota lipara Dall

Modiolus modiolus Linne

Musculus n. sp.?

Mytilus edulis Linne

Pododesmus macroschisma (Deshayes)

70APr 94 (Cenozoic loc. M4402) , Trinity Islands , Near southern end of northwest coast of Tugidak Island from a stratigraphic interval about 1,690-1,720 feet above the base of a 2,300 foot-measured section. Tugidak Formation. (from Addicott E&R report of Dec. 9, 1970)

Aforia circinata (Dall)

Cidarina aff. C. carlotta Dall

"Colus" cf. "C." spitzbergensis (Reeve)

Epitonium (Boreoscala) greenlandicum (Perry)

Latisipho cf. L. jordani (Dall)

Neptunea n. sp aff. N. lyrata (Gmelin) and .....

..... N. pribiloffensis (Dall)--strongly sculptured form

Oenopota cf. O. harpa (Dall)

Trichotropis?

Trophonopsis cf. T. pacificus (Dall)

Trophonopsis cf. T. truncatus (Strom)

Astarte montagui (Dillwyn)

Chlamys (Leochlamys) tugidakensis MacNeil

Cyclocardia crebricostata (Krause)

Macoma calcarea (Gmelin)

Macoma incongrua von Martens

Modiolus modiolus Linne

Pododesmus macroschisma (Deshayes)

Serripes aff. S. laperousii (Deshayes)

70APr96 (Cenozoic loc. M4403) , Trinity Islands , Near the middle part of the northwest coast of Tugidak Island from a 200-foot stratigraphic interval at the top of a 2,300-foot measured section. Tugidak Formation. (from Addicott E&R report of Dec. 9, 1970)

Trophonopsis cf. T. truncatus (Strom)

Cyclocardia crebricostata (Krause)