Show simple item record

dc.contributor.authorOpersko, Dayna
dc.date.accessioned2021-06-01 19:32:43 (GMT)
dc.date.available2021-06-01 19:32:43 (GMT)
dc.date.issued2021-05-01en
dc.date.submitted2021-05-03
dc.identifier.urihttp://hdl.handle.net/10012/17066
dc.description.abstractRising lake levels have become a concern for the coasts of Lake Superior and one such coastline is the Stockton Island Tombolo (SIT) that protects the Pine Barrens Habitat (PBH) in the Apostle Islands National Lakeshore (AINL), Wisconsin, United States of America. If the SIT is lost, the threatened and endangered species that live within the PBH will disappear. For the AINL managers to make an informed decision on how to protect this unique and sensitive area, they need to understand how lake level and coastal sediments will change. Lake level trends and patterns for Lake Superior have been reconstructed from ancient, preserved shorelines, creating paleohydrographs that help to understand how lake level has changed in the past by comparing age and elevation (Johnston et al., 2012). Though fieldwork has been postponed due to COVID-19, there is an opportunity here to develop ideas mentioned in Johnston et al. (2012) and Heather (2021) using topographic elevations and a correction factor to reconstruct a paleohydrograph from the ancient shorelines at AINL. Elevations were retrieved from light detection and ranging (LIDAR) data, afterwards a Digital Elevation Model (DEM) was created. The DEM was divided into the East and West strandplains and one transect from each was chosen then the two were combined to represent one SIT pattern. Then elevations were adjusted to estimate the base of the foreshore contact, normally obtained from coring shorelines to interpret past lake level elevations. Trends and patterns in the representative paleohydrograph are then compared to paleohydrographs from Johnston et al. (2012) to determine approximate ages for the ridges in the SIT. The more landward ridges, are determined to be from the Nipissing phase while the lakeward ridges, are from the Sub-Sault phase. This new remote paleohydrograph reconstruction for SIT helps to preliminarily interpret strandplain sequences on the SIT and will potentially help guide future fieldwork and better understand the context for managing the SIT and PBH in AINL.en
dc.language.isoenen
dc.publisherUniversity of Waterlooen
dc.subjectPaleohydrographen
dc.subjectApostle Islands National Lakeshoreen
dc.subjectLake Superioren
dc.subjectStrandplainsen
dc.titleRemote Paleohydrograph Reconstruction of the Stockton Island Tomboloen
dc.typeBachelor Thesisen
uws-etd.degree.departmentEarth and Environmental Sciencesen
uws-etd.degree.disciplineEarth Sciencesen
uws-etd.degreeBachelor of Scienceen
uws.contributor.advisorJohnston, John
uws.contributor.affiliation1Faculty of Scienceen
uws.published.cityWaterlooen
uws.published.countryCanadaen
uws.published.provinceOntarioen
uws.typeOfResourceTexten
uws.peerReviewStatusUnrevieweden
uws.scholarLevelUndergraduateen


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record


UWSpace

University of Waterloo Library
200 University Avenue West
Waterloo, Ontario, Canada N2L 3G1
519 888 4883

All items in UWSpace are protected by copyright, with all rights reserved.

DSpace software

Service outages