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Provenance Analysis Of The Grover Gravel Using Detrital Zircon Geochronology, Petrology And Heavy Mineral Analysis, Grant Spoering
Provenance Analysis Of The Grover Gravel Using Detrital Zircon Geochronology, Petrology And Heavy Mineral Analysis, Grant Spoering
MSU Graduate Theses
The Grover Gravel in the St. Louis, Missouri area contains a mix of chert, quartzite, jasper, and ironstone in clast sizes ranging up to 60 cm. The gravel varies in thickness from a veneer to over 30 feet and rests on upland surfaces at elevations sometimes exceeding 300 feet above the floors of major valleys. A pre-Pleistocene age generally has been proposed or assumed for the gravel, which classically has been interpreted to be a meandering-stream deposit atop an extensive flat upland surface, which was subsequently eroded and dissected by rejuvenated streams. However, large quartzite boulders in the gravel also …
Geology And Geochemistry Of The Uvas Volcanic Field And Rubio Peak Formation Of South-Central New Mexico, Usa, Max Logan Hoffman
Geology And Geochemistry Of The Uvas Volcanic Field And Rubio Peak Formation Of South-Central New Mexico, Usa, Max Logan Hoffman
MSU Graduate Theses
South-central New Mexico is characterized by many Cenozoic volcanic and tectonic events that produced a complex system of magma sources. These mechanisms are responsible for the diverse volcanic activity and magmatic evolution in New Mexico. To understand the growth and development of the mantle sources associated with these events, geochemical, petrographic, structural and spatial distribution data were collected from the Uvas volcanic field (UVF) and the Rubio Peak Formation of the Mogollon-Datil volcanic field (MDVF). Volcanic rocks from these volcanic fields were chosen based on their importance to relative timing of magmatic and tectonic transitioning events. The structural and spatial …
Lithospheric Evaluation Of The Mid-Continental Rift System In Iowa From A Gravity And Magnetic Analysis, Moamen Mohamed Almaz
Lithospheric Evaluation Of The Mid-Continental Rift System In Iowa From A Gravity And Magnetic Analysis, Moamen Mohamed Almaz
MSU Graduate Theses
The Proterozoic Midcontinent Rift System (MCRS) is considered one of the most important tectonic features in North America and was formed during a continental breakup event at 1.1 Ga (billion years). The MCRS is totally covered by Phanerozoic sedimentary rocks except in the Lake Superior region. Consequently, the geological characteristics of the MCRS are primarily inferred from extrapolations from the outcrop areas, drill holes, and from a variety of geophysical investigations. Iowa has a large segment of the MCRS which to date has only been partially investigated geophysically with little information regarding the lower crustal and upper mantle structure under …