{"id":{"repo_id":"buffalo","oai_identifier":"oai:ubir.buffalo.edu:10477/86686"},"canonical_url":"https://search.dev.ndltd.org/etd/buffalo/oai:ubir.buffalo.edu:10477/86686","repository":{"repo_id":"buffalo","name":"Buffalo","base_url":"https://ubir.buffalo.edu/oai/request"},"display":{"title":"On the Maximum Extent of the Greenland Ice Sheet in Southwestern Greenland During the LGM","abstract":"M.S.","abstract_html":"M.S.","abstract_has_math":false,"creators":["Sbarra, Christopher; 0000-0001-6702-2288"],"institution":"State University of New York at Buffalo","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Briner, Jason","Geology"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025-02-21T21:36:28Z","date_published":"2025-02-21T21:36:28Z","updated_at":"2026-07-27T19:05:34Z","subjects":["geology","environmental science"],"languages":["eng"],"rights":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10477/86686","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Briner, Jason","Geology"]},{"key":"dc:creator","label":"Author","values":["Sbarra, Christopher; 0000-0001-6702-2288"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2025-02-21T21:36:28Z","2020"]},{"key":"dc:publisher","label":"Institution","values":["State University of New York at Buffalo"]},{"key":"dc:type","label":"Dc Type","values":["Text","Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["geology","environmental science"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/10477/86686"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["M.S.","Whether the weathered, mountain summits adjacent to southwestern Greenland's coast were ice covered during the Last Glacial Maximum (LGM; ~20,000 years ago) is debated. Traditionally, the boundary between high-elevation, weathered surfaces and lower-elevation glacially sculpted surfaces has been interpreted as the upper ice limit of the Greenland Ice Sheet (GrIS) during the LGM. There is recent evidence, however, that thin, cold-based ice frozen to the bed can cover and preserve these types of weathered surfaces. A thicker LGM ice sheet in southwestern Greenland would be more consistent with the high marine limits reported in the area. I hypothesize that the high-elevation surfaces near Sisimiut, southwest Greenland, were covered by the GrIS during the LGM. I tested this hypothesis by dating high-elevation bedrock and nearby glacial erratics with cosmogenic 10Be, 26Al and 14C exposure dating. I also investigated if the margin of the GrIS extended farther onto the continental shelf than is currently mapped using an empirical relationship between the marine limit and their distant from the LGM ice sheet margin. Finally, I developed a new 2D Greenland Ice Sheet model to quantitatively compare generated RSL curves using different ice sheet extents to actual sea level curve data from the region. Collectively, this work shows that the GrIS was thicker and extended farther off the coast of southwestern Greenland during the LGM than is currently depicted in the literature. The greater ice sheet thickness in southwestern Greenland implies that a larger volume of ice melted after the LGM at a higher rate than previously estimated.","**To request an accessible version of the file(s) associated with this item, contact library@buffalo.edu. Please include the item's persistent URL [http://hdl.handle.net/. . .] in your request.**"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["On the Maximum Extent of the Greenland Ice Sheet in Southwestern Greenland During the LGM"]}]}],"canonical_facts":{"dc:contributor":["Briner, Jason","Geology"],"dc:creator":["Sbarra, Christopher; 0000-0001-6702-2288"],"dc:date":["2025-02-21T21:36:28Z","2020"],"dc:description":["M.S.","Whether the weathered, mountain summits adjacent to southwestern Greenland's coast were ice covered during the Last Glacial Maximum (LGM; ~20,000 years ago) is debated. Traditionally, the boundary between high-elevation, weathered surfaces and lower-elevation glacially sculpted surfaces has been interpreted as the upper ice limit of the Greenland Ice Sheet (GrIS) during the LGM. There is recent evidence, however, that thin, cold-based ice frozen to the bed can cover and preserve these types of weathered surfaces. A thicker LGM ice sheet in southwestern Greenland would be more consistent with the high marine limits reported in the area. I hypothesize that the high-elevation surfaces near Sisimiut, southwest Greenland, were covered by the GrIS during the LGM. I tested this hypothesis by dating high-elevation bedrock and nearby glacial erratics with cosmogenic 10Be, 26Al and 14C exposure dating. I also investigated if the margin of the GrIS extended farther onto the continental shelf than is currently mapped using an empirical relationship between the marine limit and their distant from the LGM ice sheet margin. Finally, I developed a new 2D Greenland Ice Sheet model to quantitatively compare generated RSL curves using different ice sheet extents to actual sea level curve data from the region. Collectively, this work shows that the GrIS was thicker and extended farther off the coast of southwestern Greenland during the LGM than is currently depicted in the literature. The greater ice sheet thickness in southwestern Greenland implies that a larger volume of ice melted after the LGM at a higher rate than previously estimated.","**To request an accessible version of the file(s) associated with this item, contact library@buffalo.edu. Please include the item's persistent URL [http://hdl.handle.net/. . .] in your request.**"],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/10477/86686"],"dc:language":["eng"],"dc:publisher":["State University of New York at Buffalo"],"dc:rights":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."],"dc:subject":["geology","environmental science"],"dc:title":["On the Maximum Extent of the Greenland Ice Sheet in Southwestern Greenland During the LGM"],"dc:type":["Text","Thesis"]},"updated_at":"2026-07-27T19:05:34Z"}