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Stratigraphy, Paleontology, and Paleogeography of the Middle Pleistocene Tugidak Formation, Trinity Island, Alsaka

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Date Issued:
2008
Summary:
Tugidak Island, the northenunost of the Trinity Islands off the S W coast of Kodiak Island is the stratotype of the Tugidak Formation. The continuous section ofthe Tugidak Formation crops out in the sea cliffs along the northern and southwestern parts of the island and is the most complete section in the Trinity Islands. The exposed section of the Tugidak Formation is composed of 1395 m of glacial marine diamictite containing abundant molluscan fossils. Seismic profiles and well data indicate a regionally extensive deposition of the Tugidak Formation across the Kodiak Shelf. Paleomagnetic sampling and diatom analysis in this work has further refined the age of the Tugidak Formation as early-middle Pleistocene. By attempting a reconstruction of the tectonic evolution and through faunal identification, inferences are made about the paleobiogeography, paleoclimate and timing of sedimentary depositional cycles, around Tugidak Island.
Title: Stratigraphy, Paleontology, and Paleogeography of the Middle Pleistocene Tugidak Formation, Trinity Island, Alsaka.
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Name(s): Porath, Dennis A.
Oleinik, Anton E., Thesis advisor
Florida Atlantic University, Degree grantor
Type of Resource: text
Genre: Electronic Thesis Or Dissertation
Date Created: 2008
Date Issued: 2008
Publisher: Florida Atlantic University
Place of Publication: Boca Raton, Fla.
Physical Form: application/pdf
Extent: 157 p.
Language(s): English
Summary: Tugidak Island, the northenunost of the Trinity Islands off the S W coast of Kodiak Island is the stratotype of the Tugidak Formation. The continuous section ofthe Tugidak Formation crops out in the sea cliffs along the northern and southwestern parts of the island and is the most complete section in the Trinity Islands. The exposed section of the Tugidak Formation is composed of 1395 m of glacial marine diamictite containing abundant molluscan fossils. Seismic profiles and well data indicate a regionally extensive deposition of the Tugidak Formation across the Kodiak Shelf. Paleomagnetic sampling and diatom analysis in this work has further refined the age of the Tugidak Formation as early-middle Pleistocene. By attempting a reconstruction of the tectonic evolution and through faunal identification, inferences are made about the paleobiogeography, paleoclimate and timing of sedimentary depositional cycles, around Tugidak Island.
Identifier: FA00000810 (IID)
Degree granted: Thesis (M.S.)--Florida Atlantic University, 2008.
Note(s): Charles E. Schmidt College of Science
Subject(s): Tugidak Island Critical Habitat Area (Alaska)
Historical geology--Alaska--Tugidak Island
Geomorphology--Alaska--Tugidak Island
Geology, Stratigraphic
Paleogeography--Alaska--Tugidak Island
Held by: Florida Atlantic University Libraries
Sublocation: Digital Library
Persistent Link to This Record: http://purl.flvc.org/fau/fd/FA00000810
Use and Reproduction: http://rightsstatements.org/vocab/InC/1.0/
Host Institution: FAU
Is Part of Series: Florida Atlantic University Digital Library Collections.