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2009 Portland GSA Annual Meeting (18-21 October 2009)

Paper No. 28
Presentation Time: 9:00 AM-6:00 PM

DETERMINATION OF PALEOLATITUDE OF THE MISSISSIPPIAN MICHIGAN FORMATION: JACKSON, MICHIGAN


POSNER, Esther S.1, BUZZELL, James L.2, BARR, J.G.3 and ZDAN, Stephen A.2, (1)Department of Geology, Grand Valley State University, 3030 Lake Michigan Dr, Apt. #3, Grand Rapids, MI 49504, (2)Department of Geology, Grand Valley State University, 118 Padnos, Grand Valley State University, Allendale, MI 49401, (3)Geology Department, Grand Valley State University, Allendale, MI 49401, girlthatwalks@gmail.com

We measured detrital remanant magnetism induced by a past magnetic field(s) within shale units of the Mississippian Michigan Formation. One inch cubes were cut from a core from a borehole in Jackson, Michigan, and tested using a spinner magnetometer and alternating field demagnetization. We used a spinner magnetometer to infer paleolatitude and to test our hypothesis of detrital remanent magnetism (induced during deposition) as the carrier of remanent magnetism. Data collected from a suite of samples show a paleo-inclination (dip) of -11.9° ± 46° which corresponds to a paleolatitude of approximately 6° south of the equator. A secondary overprint of magnetism shows an inclination of 67.9° which translates to a modern latitude of 51° North.

Session No. 42--Booth# 388

T67. Sedimentary Geology of the Next Generation: Student Posters (Posters)
Sunday, 18 October 2009: 9:00 AM-6:00 PM
Hall A (Oregon Convention Center)
Geological Society of America Abstracts with Programs. Vol. 41, No. 7, p.146
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