Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 14 of 14 for “"Stratigraphic--Pleistocene"”.
-
Pleistocene geology of the Grand Forks-Bemidji area, northwestern Minnesota
… <p>Surface materials mapped range in age from Pleistocene to Holocene and include glacial, glaciofluvial, lacustrine, bog, eolian, and alluvial sediments.</p> <p>Sixteen power-auger test holes, two measured sections along the Red Lake River, two composite sections from earlier drilling pro …
-
Surficial geology of northern Griggs County, North Dakota
… county is mantled with three, or possibly four Pleistocene drift sheets, separated by outwash deposits. These drift sheets lie unconformably on the Cretaceous Pierre Shale which is exposed in the Sheyenne River valley and the Binford Hills. Because the drift sheets have similar lithologic and …
-
Pleistocene geology of northern Kidder county, North Dakota
<p>The topography of northern Kidder County is due almost entirely to glacial deposition. This are is covered with glacial drift up to a thickness of at least 269 feet which was deposited during Wisconsin ice advances. Seventy-five percent of the area has stagnation moraine which typically exhibits …
-
Heavy minerals of glacial sediments in the area of Red Lake Falls, Minnesota
Pleistocene lithostratigraphic units containing glacial sediments in the Red Lake Falls, Minnesota, area and adjacent areas were studied to determine their heavy-mineral assemolages. Seventy-two samples of fine sand were studied by optical grain-count methods and 77 samples of fine sand were …
-
Pleistocene geology of the Comstock-Sebeka area, west-central Minnesota
… long.</p> <p>Surface materials include Pleistocene glacial sediment and Pleistocene and Holocene fluvial, lacustrine, eolian, and bog sediment.</p> <p>Four geomorphic districts are recognized. The flat Lake-Plain District is underlain by sand, silt, and clay that was deposited as …
-
Stratigraphy and history of the Sakakawea Sequence, south-central North Dakota
<p>The Sakakawea Sequence (Pleistocene) in North Dakota contains six formations that make up the Coleharbor Group (Pleistocene). The Braddock Formation (Wisconsinan) is mainly glacial sediment. The Emmons Formation (late Wisconsinan) is mainly glacial sediment. The Four Bears Formation …
-
Glacial geology of the north half of Barnes County, North Dakota
… and their mode of origin discussed.</p> <p>Pleistocene stratigraphy is discussed under two headings: Indeterminant stages, and the Wisconsinan stage. Two deposits of indeterminant age are represented. One consists of inclusions of till of orange color in a buff till matrix. The boundaries of …
-
Glacial stratigraphy of northwestern Cass County, North Dakota
… kettles and beach deposits.</p> <p>Seven lithostratigraphic units were identified on the basis of texture, very coarse sand lithology, matrix calcite-dolomite composition, clay mineralogy, density, and stratigraphic position. Three till units, "A", "D" and "G", were distinguished primarily on …
-
Pleistocene stratigraphy of the Red Lake Falls area, Minnesota
<p> Seven formations are present along a 50-mile stretch of the Red Lake River in Pennington, Red Lake, and Polk Counties, Minnesota. Five formations are largely glacial, sediment, and two are largely lacustr1ne sediment deposited during phases of Lake Agassiz. </p><p> The Gervais Formation …
-
Stratigraphy of offshore sediment of Lake Agassiz, North Dakota
<p>Lake Agassiz occupied the Red River Valley between about 13,800 and 9,000 years ago. The Late Wisconsinan ice sheet that covered the Red River Valley retreated far enough to expose the drainage divide in northern South Dakota and south-central Minnesota sometime after 14,000 B.P. and meltwater …
-
Glacial Stratigraphy of northeastern North Dakota
<p>Seven lithostratigraphic units (formations} composed dominantly of glacial sediment have been recognized in northeastern North Dakota. Three formations, the Falconer Formation (Harris and others, 1974}, the Dahlen, and Gardar Formations (Salomon, 1975). Have been previously recognized. Four …
-
Late Pleistocene and Holocene geology of the Moe Site, New Town, North Dakota
Eight stratigraphic units of Late Cenoioic age are present around the Moe Archeological Site near New Town, North Dakota. Unit Zero is a layer of glacial sediment consisting of grayish brown pebbly clay loam. Unit One consists of fluvial and beach sand and gravel. Unit Two consists of light …
-
A high resolution gravity survey for the detection of Pleistocene aquifers underlying the Fort Berthold Indian Reservation, North Dakota
… The study was performed to locate and map Pleistocene sand and gravel aquifers. Well data indicate that aquifers beneath the study area range in thickness from 1 to 60 meters. The Bouguer gravity anomalies resulting from these shallow aquifers was estimated to be on the order of 1 to 2 …
-
Sedimentology and Stratigraphy of Glacial Lake Souris, North Dakota: effects of a glacial-lake outburst
<p>Glacial-lake outbursts commonly occurred along the southern margin of the Laurentide Ice Sheet as ice-marginal lakes suddenly drained. These outbursts released huge volumes of water with tremendous erosive potential, forming large trench-shape channels. Although glacial-lake spillways have been …