Global ETD Search
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Showing 1 to 3 of 3 for “"Dominant lithologies"”.
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The Rhame bed (Slope Formation, Paleocene), a silcrete and deep weathering profile, in southwestern North Dakota
… <p>The Rhame Bed typically consists of two dominant lithologies: siliceous rock and white sediment. The siliceous rock is hard, gray, and made of silt-sized detrital quartz grains in a matrix of microcrystal line quartz. It contains abundant casts and molds of branches, stems or roots of …
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Deposition and diagenesis of a portion of the Frobisher-Alida Interval (Mississippian Madison Group), Wiley Field, North Dakota
… the study area, the distribution of fossils, dominant lithologies, and cement types indicate that lithofacies were formed in response to a horizontal salinity gradient in the water mass with salinities increasing to the northeast. The relative position of salinity values laterally across the …
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Geology and petrogenesis of the Tuscarora Intrusion of the Duluth Complex, Gillis Lake 7.5’ quadrangle, northeastern Minnesota
… Previous studies have interpreted the two lithologies as being interlayered, a relationship that would be unique within the Duluth Complex. Field mapping has identified two lithologically distinct stratigraphic zones within the Tuscarora Intrusion. The lower zone is composed of olivine …