Sedimentation Rates of a Pro-Glacial Lake
Description/Abstract/Artist Statement
Pro-glacial systems are very sensitive to climate change. Low lying areas near glaciers are beginning to fill with meltwater and sediment. To determine the sedimentation rate of a newly forming pro-glacial lake in Iceland, a sediment core was collected. SV22-24 CORE75 was collected using a vibra-corer from a subaquatic location in lake Sandvatn, Iceland and is the core sample used for this analysis. We sub-sectioned CORE75 into 28 different vertical sections that are 1 cm thick. We examined each section for moisture content and loss-on-ignition measurements. The samples were also subjected to analysis by radium delayed coincidence counter for Th-228 decay products. The decay of Th-228 (t1/2=1.9 y) will be used to show that the current sedimentation rate is 67 mm/y +/- 5 mm/y over the last decade. It is important to discuss how this result compares to similar systems, and how climate change has affected the formation of these lakes.
Faculty Advisor/Mentor
Joseph Tamborski
Faculty Advisor/Mentor Department
Ocean and Earth Sciences Department
College Affiliation
College of Sciences
Presentation Type
Poster
Disciplines
Geology | Hydrology | Other Chemistry | Sedimentology
Session Title
Poster Session
Location
Learning Commons Lobby @ Perry Library
Start Date
3-25-2023 8:30 AM
End Date
3-25-2023 10:00 AM
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Sedimentation Rates of a Pro-Glacial Lake
Learning Commons Lobby @ Perry Library
Pro-glacial systems are very sensitive to climate change. Low lying areas near glaciers are beginning to fill with meltwater and sediment. To determine the sedimentation rate of a newly forming pro-glacial lake in Iceland, a sediment core was collected. SV22-24 CORE75 was collected using a vibra-corer from a subaquatic location in lake Sandvatn, Iceland and is the core sample used for this analysis. We sub-sectioned CORE75 into 28 different vertical sections that are 1 cm thick. We examined each section for moisture content and loss-on-ignition measurements. The samples were also subjected to analysis by radium delayed coincidence counter for Th-228 decay products. The decay of Th-228 (t1/2=1.9 y) will be used to show that the current sedimentation rate is 67 mm/y +/- 5 mm/y over the last decade. It is important to discuss how this result compares to similar systems, and how climate change has affected the formation of these lakes.