{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/88224"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/88224","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Multibeam echosounding as a tool for mapping geologic features, bathymetry and modern vents, Yellowstone National Park, Wyoming","abstract":"Yellowstone National Park (YNP) is a unique area for study due to the broad range of geologic and geomorphic agents that have sculpted this terrain over time. This research employed a multibeam echosounder (MBES) in Lewis Lake and Yellowstone Lake, in August 2011, to describe and interpret the geologic and geomorphic processes that have shaped Lewis Lake, as well as enhance our understanding of selected hydrothermally-active areas within Yellowstone Lake. Since the eruption that formed the present day caldera 640,000 years ago, dozens of smaller eruptions of differing compositions have occurred. The first-ever bathymetric and acoustic backscatter map of Lewis Lake shows that the lake morphology has been shaped by at least four separate volcanic events. These include tuff, rhyolitic and pyroclastic flows that have altered the hydrothermal plumbing of the lake bed. Using this data, a timeline for the evolution of Lewis Lake has been constructed that allows the geology of the lake floor to be integrated into existing ‘onshore’ outcrop studies. MBES mapping was also used to examine three areas hydrothermally active areas of Yellowstone Lake: the Inflated Plain, Elliot’s Crater, and the Stephenson Island depression chain. These surveys yielded high-resolution bathymetric maps. Additionally, acoustic returns from the water column were used to determine the location of active degassing areas, as well as rates of gas discharge from a hydrothermal crater in the Inflated Plain, Yellowstone Lake. Using the acoustic returns in the water column, a rate of 0.72-726.6 g m-2 day-1 was calculated to be erupting from this individual sub-aqueous crater. These rates are consistent with gas discharge directly measured in other hydrothermal vents around the world. These results have shown the potential for MBES technology not only to produce high-resolution bathymetric maps, but also aid in geologic mapping as well as geohazard evaluation in subaqueous hydrothermal environments.","abstract_html":"Yellowstone National Park (YNP) is a unique area for study due to the broad range of geologic and geomorphic agents that have sculpted this terrain over time. This research employed a multibeam echosounder (MBES) in Lewis Lake and Yellowstone Lake, in August 2011, to describe and interpret the geologic and geomorphic processes that have shaped Lewis Lake, as well as enhance our understanding of selected hydrothermally-active areas within Yellowstone Lake. Since the eruption that formed the present day caldera 640,000 years ago, dozens of smaller eruptions of differing compositions have occurred. The first-ever bathymetric and acoustic backscatter map of Lewis Lake shows that the lake morphology has been shaped by at least four separate volcanic events. These include tuff, rhyolitic and pyroclastic flows that have altered the hydrothermal plumbing of the lake bed. Using this data, a timeline for the evolution of Lewis Lake has been constructed that allows the geology of the lake floor to be integrated into existing ‘onshore’ outcrop studies. MBES mapping was also used to examine three areas hydrothermally active areas of Yellowstone Lake: the Inflated Plain, Elliot’s Crater, and the Stephenson Island depression chain. These surveys yielded high-resolution bathymetric maps. Additionally, acoustic returns from the water column were used to determine the location of active degassing areas, as well as rates of gas discharge from a hydrothermal crater in the Inflated Plain, Yellowstone Lake. Using the acoustic returns in the water column, a rate of 0.72-726.6 g m-2 day-1 was calculated to be erupting from this individual sub-aqueous crater. These rates are consistent with gas discharge directly measured in other hydrothermal vents around the world. These results have shown the potential for MBES technology not only to produce high-resolution bathymetric maps, but also aid in geologic mapping as well as geohazard evaluation in subaqueous hydrothermal environments.","abstract_has_math":false,"creators":["Cash, Ronald"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Geology","degree_department":null,"school":null,"contributors":["Best, Jim"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-29T20:50:23Z","date_published":"2015-09-29T20:50:23Z","updated_at":"2026-07-22T22:26:31Z","subjects":["Yellowstone National Park","Hydrothermal","bathymetry","multibeam","vent","acoustic","remote sensing"],"languages":["en"],"rights":["Copyright 2015 Ronald Cash"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/88224","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Best, Jim"]},{"key":"dc:creator","label":"Author","values":["Cash, Ronald"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-29T20:50:23Z","2017-09-30T09:15:18Z","2015-08","2015-07-23","2015-8"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Geology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Yellowstone National Park","Hydrothermal","bathymetry","multibeam","vent","acoustic","remote sensing"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2015 Ronald Cash"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/88224"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Yellowstone National Park (YNP) is a unique area for study due to the broad range of geologic and geomorphic agents that have sculpted this terrain over time. This research employed a multibeam echosounder (MBES) in Lewis Lake and Yellowstone Lake, in August 2011, to describe and interpret the geologic and geomorphic processes that have shaped Lewis Lake, as well as enhance our understanding of selected hydrothermally-active areas within Yellowstone Lake. Since the eruption that formed the present day caldera 640,000 years ago, dozens of smaller eruptions of differing compositions have occurred. The first-ever bathymetric and acoustic backscatter map of Lewis Lake shows that the lake morphology has been shaped by at least four separate volcanic events. These include tuff, rhyolitic and pyroclastic flows that have altered the hydrothermal plumbing of the lake bed. Using this data, a timeline for the evolution of Lewis Lake has been constructed that allows the geology of the lake floor to be integrated into existing ‘onshore’ outcrop studies. MBES mapping was also used to examine three areas hydrothermally active areas of Yellowstone Lake: the Inflated Plain, Elliot’s Crater, and the Stephenson Island depression chain. These surveys yielded high-resolution bathymetric maps. Additionally, acoustic returns from the water column were used to determine the location of active degassing areas, as well as rates of gas discharge from a hydrothermal crater in the Inflated Plain, Yellowstone Lake. Using the acoustic returns in the water column, a rate of 0.72-726.6 g m-2 day-1 was calculated to be erupting from this individual sub-aqueous crater. These rates are consistent with gas discharge directly measured in other hydrothermal vents around the world. These results have shown the potential for MBES technology not only to produce high-resolution bathymetric maps, but also aid in geologic mapping as well as geohazard evaluation in subaqueous hydrothermal environments.","Submission published under a 24 month embargo labeled 'U of I only', the embargo will last until 2017-08-01","The student, Ronald Cash, accepted the attached license on 2015-07-21 at 16:24.","The student, Ronald Cash, submitted this Thesis for approval on 2015-07-21 at 16:25.","This Thesis was approved for publication on 2015-07-23 at 09:14.","DSpace SAF Submission Ingestion Package generated from Vireo submission #8593 on 2015-09-29 at 15:00:55","Made available in DSpace on 2015-09-29T20:50:23Z (GMT). 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This research employed a multibeam echosounder (MBES) in Lewis Lake and Yellowstone Lake, in August 2011, to describe and interpret the geologic and geomorphic processes that have shaped Lewis Lake, as well as enhance our understanding of selected hydrothermally-active areas within Yellowstone Lake. Since the eruption that formed the present day caldera 640,000 years ago, dozens of smaller eruptions of differing compositions have occurred. The first-ever bathymetric and acoustic backscatter map of Lewis Lake shows that the lake morphology has been shaped by at least four separate volcanic events. These include tuff, rhyolitic and pyroclastic flows that have altered the hydrothermal plumbing of the lake bed. Using this data, a timeline for the evolution of Lewis Lake has been constructed that allows the geology of the lake floor to be integrated into existing ‘onshore’ outcrop studies. MBES mapping was also used to examine three areas hydrothermally active areas of Yellowstone Lake: the Inflated Plain, Elliot’s Crater, and the Stephenson Island depression chain. These surveys yielded high-resolution bathymetric maps. Additionally, acoustic returns from the water column were used to determine the location of active degassing areas, as well as rates of gas discharge from a hydrothermal crater in the Inflated Plain, Yellowstone Lake. Using the acoustic returns in the water column, a rate of 0.72-726.6 g m-2 day-1 was calculated to be erupting from this individual sub-aqueous crater. These rates are consistent with gas discharge directly measured in other hydrothermal vents around the world. These results have shown the potential for MBES technology not only to produce high-resolution bathymetric maps, but also aid in geologic mapping as well as geohazard evaluation in subaqueous hydrothermal environments.","Submission published under a 24 month embargo labeled 'U of I only', the embargo will last until 2017-08-01","The student, Ronald Cash, accepted the attached license on 2015-07-21 at 16:24.","The student, Ronald Cash, submitted this Thesis for approval on 2015-07-21 at 16:25.","This Thesis was approved for publication on 2015-07-23 at 09:14.","DSpace SAF Submission Ingestion Package generated from Vireo submission #8593 on 2015-09-29 at 15:00:55","Made available in DSpace on 2015-09-29T20:50:23Z (GMT). No. of bitstreams: 2 CASH-THESIS-2015.pdf: 5740919 bytes, checksum: 4f82e3070912a92cd70421c19ccf12ac (MD5) LICENSE.txt: 4208 bytes, checksum: 8fd08e858b3a91874a65fc1cd9796fb8 (MD5) Previous issue date: 2015-07-23","Embargo set by: Seth Robbins for item 89504 Lift date: 2017-09-29T20:50:34Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","U of I Only Restriction Lifted for Item 89504 on 2017-09-30T09:15:18Z."],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/88224"],"dc:language":["en"],"dc:rights":["Copyright 2015 Ronald Cash"],"dc:subject":["Yellowstone National Park","Hydrothermal","bathymetry","multibeam","vent","acoustic","remote sensing"],"dc:title":["Multibeam echosounding as a tool for mapping geologic features, bathymetry and modern vents, Yellowstone National Park, Wyoming"],"dc:type":["text"],"thesis:degree_discipline":["Geology"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:31Z"}