Physical Sciences and Mathematics Commons^™

The Bedrock Geology Of The Southwest Part Of The Kachess Lake Quadrangle, Washington, David Carl Lofgren

Dissertations and Theses

The southwestern part of the Kachess Lake quadrangle lies between Lakes Cle Elum and Kachess, on the east flank of the central Cascade Range of Washington. The region lies between the North and South Cascade petrologic provinces, and includes rocks typical of each. Pre-Tertiary Easton Schist (called the Shuksan Suite farther north), and the Late Cretaceous-Paleocene Swauk Formation occur widely in the North Cascades, while the Tertiary Silver Pass Volcanics and Teanaway Basalt are typical of South Cascade volcanic sequences. Diabasic dikes of the Teanaway dike swarm occur throughout the vicinity.

The area is bounded on the west by a …

Structural Geology Of The Northern Part Of Clarkston Mountain, Malad Range, Utah-Idaho, Steven Mark Burton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The northern part of Clarkston Mountain, in northern Utah and southern Idaho, is located about 23 miles northwest of Logan, Utah. It extends across the Malad Range from Malad Valley on the west to Cache Valley on the east. The mapped area measures 4.8 miles in the north-south direction and 6.8 miles in the east-west direction.

The Brigham Formation of Cambrian age is the oldest exposed stratigraphic unit. It consists mainly of quartzite. Younger Cambrian units include the Langston, Ute, Blacksmith, Bloomington, Nounan, and St. Charles Formations. The Garden City Formation of Ordovician age is the youngest Paleozoic unit. The …

Preliminary Report Of The Oil And Gas Possibilities Between Pine And Cumberland Mountains, Southeastern Kentucky, A J. Froelich

Report of Investigations--KGS

Elongate, low-amplitude flexures in strata of Pennsylvanian age have been delineated in recent mapping by the U. S. Geological Survey in co­operation with the Kentucky Geological Survey in a 600-square-mile (l ,536- square-kilometer) area between Pine and Cumberland Mountains in south­eastern Kentucky. Cresta! culminations on gentle anticlinal folds may indicate loci of subsurface closures for entrapment of oil and gas. The area studied is underlain by more than 15,000 feet (4,500 meters) of Paleozoic strata containing potential source-beds, reservoirs, and cap rocks. Faults, unconformities, abrupt facies changes, and regional thickness variations en­hance the geologic setting for possible oil and gas …

Quaternary Geology Of Sargent County, North Dakota, Dennis N. Neilsen

Theses and Dissertations

Sargent County, in southeastern North Dakota, was glaciated during the Pleistocene Epoch. Objectives of a study of Sargent County were to (1) describe the surface sediment and interpret its origin, (2) correlate, where possible, this sediment with that of adjacent areas, and (3) recon struct the general geologic history of the county for the Quaternary Period.

A geologic map of the county was prepared using field data, topo graphic maps, aerial stereopairs, and soil maps. A map showing surface sediment origin was subsequently made using the available field and laboratory information.

Most of Sargent County is typical rolling prairie underlain …

Pleistocene Stratigraphy Of The Red Lake Falls Area, Minnesota, Kenneth L. Harris

Theses and Dissertations

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.

The Gervais Formation (pre-Wisconsinan or early Wisconsinan) is mostly fluvial or lacustrine sediment modified by glacial ice of unknown source. The Marcoux Formation (pre Wisconsinan or Wisconsinan) is largely sediment deposited by glacial ice that advanced from the northeast over the Canadian Shield. The St. Hilaire. Formation (Wisconsinan) is mainly sediment deposited by glacial ice that advanced from a western or …

A Quarter Century Of Geology At The Gulf Coast Research Laboratory (1948-1973), Ervin G. Otvos Jr.

Gulf and Caribbean Research

Overview of the history of geology courses and research at the Gulf Coast Research Laboratory in Ocean Springs, Mississippi.

Heavy Minerals Of Glacial Sediments In The Area Of Red Lake Falls, Minnesota, Howard Hobbs

Theses and Dissertations

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 studied by x-ray diffraction methods. Most formations contain a hornblende-garnet-pyroxene-epidote assemblage; the Gervais Formation contains a pyroxene-hornblende assemblage. The mean proportion of the constituent minerals is different in each formation; however, there is overlap in the ranges of heavy mineral proportions among the formations. The Red Lake Falls Formation can be subdivided on the basis of garnet abundance.

Stratigraphic Comparison Of The Precambrian Wyman And Johnnie Formations In The Western Great Basin, California, Johnnie Nathan Moore

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Precambrian Johnnie Formation in the Death Valley area and to the south is separable into two facies. The southern facies contains six distinct members: the transitional, quartzite, lower carbonate-bearing, siltstone, upper carbonate-bearing, and Rainstorm members. Dolomite, quartzite, and mudstone characterize the southern facies, as does the presence of the Johnnie oolite. To the north the Johnnie oolite pinches out and the amount of mudstone in the formation increases. The dominantly mudstone northern facies contains local gray limestone lenses closely similar to limestone in the Wyman Formation in the White-Inyo Mountains. Generally outcrops of the northern facies of the Johnnie …

Stratigraphy And Sedimentary History Of Middle Cenozoic (Oligocene And Miocene) Deposits In North Dakota, William J. Stone

Theses and Dissertations

Middle Cenozoic (Oligocene and Miocene) continental deposits of North America have been most studied in southwestern South Dakota and western Nebraska where the White River Group constitutes a fairly complete Oligocene record, and the Arikaree Group of early Miocene age is commonly the sole remaining record of that epoch. Isolated outcrops in adjacent states also offer opportunities for studying the middle Cenozoic history of the Midcontinent but disagreement as to the physical stratigraphy of such deposits has hindered further work in these areas. The main purpose of this study is to present a viable stratigraphic framework for the middle Cenozoic …