Timothy G Fisher

Biographic Data

ID6370708
NAMETimothy G Fisher
GIVEN NAMESTimothy G
FAMILY NAMEFisher
SIGNATUREFISHER T G
AFFILIATIONSUniversity of Toledo
ORCID0000-0003-3339-4731
VERIFIEDYes
TOTAL WORKS16
TOTAL CITATIONS2
AUTHOR COUNT16
EDITOR COUNT0
FIRST PUBLICATION YEAR1993
LATEST PUBLICATION YEAR2020
H-INDEX1

  • Minimum limiting deglacial ages for the out-of-phase Saginaw Lobe of the Laurentide Ice Sheet using optically stimulated luminescence (OSL) and radiocarbon methods

    Open AccessTimothy G Fisher, Mitchell R Dziekan et al.ARTICLEQuaternary Research2020

    Twenty-four new optically stimulated luminescence (OSL) and radiocarbon ages from sediment cores in nine lakes associated with the Shipshewana and Sturgis moraines in northern Indiana and southern Michigan estimate when recession of the Saginaw Lobe of the Laurentide Ice Sheet was underway in the southern Great Lakes region, USA. Average OSL ages of 23.4 ± 2.2 ka for the Shipshewana Moraine and 19.7 ± 2.2 ka for the Sturgis Moraine are considered…

  • The surficial geology of the Delta 7.5-minute series quadrangle, Fulton County, Ohio, USA

    Open AccessJoseph D Blockland, Timothy G FisherARTICLEJournal of Maps2016

    The surficial geology of the Delta 7.5-minute series quadrangle, and sections of the adjacent quadrangles (ca. 54.5 km 2 ), was mapped to elucidate the deglacial history of the Huron–Erie Lake Plain in northwest Ohio. Five depositional environments were identified: alluvial, aeolian, glacial, glaciolacustrine and glaciofluvial. The depositional environments were mapped on a hillshaded, light detecting and ranging digital elevation model using a s…

  • A Chronology for glacial Lake Agassiz shorelines along Upham's namesake transect

    Open AccessKenneth Lepper, Alex W Buell et al.ARTICLEQuaternary Research2013

    Four traditionally recognized strandline complexes in the southern basin of glacial Lake Agassiz are the Herman, Norcross, Tintah and Campbell, whose names correspond to towns in west-central Minnesota that lie on a linear transect defined by the Great Northern railroad grade; the active corridor for commerce at the time when Warren Upham was mapping and naming the shorelines of Lake Agassiz (ca.1880–1895). Because shorelines represent static wat…

  • What caused the low-water phase of glacial Lake Agassiz?

    Open AccessThomas V Lowell, Patrick J Applegate et al.ARTICLEQuaternary Research2013

    First-order modeling suggests that a low-water phase in late-glacial Lake Agassiz can be explained through changes in the balance between evaporation, precipitation, and runoff, rather than drainage. The low-water Moorhead Phase is often attributed to drainage through outlets opened by isostatic depression and retreat of the Laurentide ice margin. However, new data indicate that the proposed outlets were ice-covered during the Moorhead Phase. Ins…

  • Testing northwest drainage from Lake Agassiz using extant ice margin and strandline data

    Open AccessTimothy G Fisher, Thomas V LowellARTICLEQuaternary International2012

  • Terrestrial sensitivity to abrupt cooling recorded by aeolian activity in northwest Ohio, USA

    Open AccessMelinda C Campbell, Timothy G Fisher et al.ARTICLEQuaternary Research2011

    Optically stimulated luminescence dated sand dunes and Pleistocene beach ridges in northwest Ohio are used to reconstruct landscape modification more than 5000 yr after deglaciation. Four of the OSL ages (13.3–11.1 ka) cluster around the Younger Dryas cold event, five ages (10.8–8.2 ka) cluster around the Preboreal, one young age (0.9–0.7 ka) records more recent aeolian activity, and one age of 15.1–13.1 ka dates a barrier spit in Lake Warren. In…

  • Early Holocene dune activity linked with final destruction of Glacial Lake Minong, eastern Upper Michigan, USA

    Open AccessHenry M Loope, Walter L Loope et al.ARTICLEQuaternary Research2010

    The early Holocene final drainage of glacial Lake Minong is documented by 21 OSL ages on quartz sand from parabolic dunes and littoral terraces and one radiocarbon age from a lake sediment core adjacent to mapped paleoshorelines in interior eastern Upper Michigan. We employ a simple model wherein lake-level decline exposes unvegetated littoral sediment to deflation, resulting in dune building. Dunes formed subsequent to lake-level decline prior t…

  • Feasibility Study of Mapping Continuous Water Planes Along the Southeast Lake Agassiz Basin

    Open AccessMatthew B Weller, Timothy G FisherARTICLEJournal of Maps2009

    Please click here to download the map associated with this article. Numerous researchers have reconstructed water planes of glacial Lake Agassiz by mapping discontinuous strandlines throughout the basin. Here we use a detailed, systematic approach using large-scale topographic maps, satellite imagery from Google Earth, and 1/3 arcsecond digital elevation models to map water planes in the southeastern basin of Minnesota from 46°30′ to 48°15′ N lat…

  • Paleowetlands and regional climate change in the central Atacama Desert, northern chile

    Open AccessJay Quade, Jason A Rech et al.ARTICLEQuaternary Research2008

    Widespread, organic-rich diatomaceous deposits are evidence for formerly wetter times along the margins of the central Atacama Desert, one of the driest places on Earth today. We mapped and dated these paleowetland deposits at three presently waterless locations near Salar de Punta Negra (24.5°S) on the western slope of the Andes. Elevated groundwater levels supported phreatic discharge into wetlands during two periods: 15,900 to ~ 13,800 and 12,…

  • Elucidating aeolian dune history from lacustrine sand records in the Lake Michigan Coastal Zone, USA

    Open AccessEmily A Timmons, Timothy G Fisher et al.ARTICLEThe Holocene2007Cited by: 1References: 2

    Aeolian sand in two small lakes within a Lake Michigan coastal-dune complex southwest of Holland, Michigan, provides a more detailed higher-resolution history of dune activity, during the later half of the Holocene, than do combined palaeosol and OSL ages from the dunes themselves. The sand signal from four cores within these lakes consists of visible sand laminae and invisible sand peaks within mud and sapropel units. Early in the history of dun…

  • Aeolian sand preserved in Silver Lake

    Open AccessTimothy G Fisher, Walter L LoopeARTICLEThe Holocene2005Cited by: 1References: 3

    Aeolian sand within lake sediment from Silver Lake, Michigan can be used as a proxy for the timing of high lake levels of Lake Michigan. We demonstrate that the sand record from Silver Lake plotted as percent weight is in-phase with the elevation curve of Lake Michigan since the mid-Holocene Nipissing Phase. Because fluctuations in Lake Michigan's lake level are recorded in beach ridges, and are a response to climate change, the aeolian sand reco…

  • Chronology of glacial Lake Agassiz meltwater routed to the Gulf of Mexico

    Open AccessTimothy G FisherARTICLEQuaternary Research2003

    Sediment cores with new radiocarbon dates from the southern outlet of glacial Lake Agassiz indicate that meltwater delivery to the Mississippi valley was disrupted at 10,800 14 C yr B.P. and the outlet was abandoned by 9400 14 C yr B.P. These findings confirm the timing of generally accepted terminations of the Lockhart and Emerson Phases of Lake Agassiz. Additionally, the radiocarbon chronology indicates that the spillway was fully formed by 10,…

  • Sedimentary and stratigraphic evidence for subglacial flooding, south-central Michigan, USA

    Open AccessTimothy G Fisher, Lawrence D TaylorARTICLEQuaternary International2002

  • Incipient tunnel channels

    Open AccessDarren B Sjogren, Timothy G Fisher et al.ARTICLEQuaternary International2002

  • The role of outburst floods and glacial meltwater in subglacial and proglacial landform genesis

    Open AccessTimothy G Fisher, John J Clague et al.ARTICLEQuaternary International2002

  • Exploration for Pleistocene aggregate resources using process-depositional models in the Fort Mcmurray region, Ne Alberta, Canada

    Open AccessTimothy G Fisher, Derald G SmithARTICLEQuaternary International1993