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

• Other Authors: Porath, Dennis A., Oleinik, Anton E. (Thesis advisor), Florida Atlantic University (Degree grantor)
• Format: Thesis
• Language: English
• Published: Florida Atlantic University
• Subjects: Tugidak Island Critical Habitat Area (Alaska); Historical geology > Alaska > Tugidak Island; Geomorphology > Alaska > Tugidak Island; Geology; Stratigraphic; Paleogeography > Alaska > Tugidak Island; Trinity Island; Trinity Islands; Kodiak; Alaska
• Online Access: http://purl.flvc.org/fau/fd/FA00000810; https://fau.digital.flvc.org/islandora/object/fau%3A36337/datastream/TN/view/Stratigraphy,%20Paleontology,%20and%20Paleogeography%20of%20the%20Middle%20Pleistocene%20Tugidak%20Formation,%20Trinity%20Island,%20Alsaka.jpg

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. Charles E. Schmidt College of Science Thesis (M.S.)--Florida Atlantic University, 2008.