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Mineralogy and Provenance of Pink Inclusions in the Illinoian Titusville Till, Mahoning County, Eastern Ohio

Franko, Belinda J.
http://rave.ohiolink.edu/etdc/view?acc_num=akron1216230710

Abstract Details

2008, Master of Science, University of Akron, Geology.
Researchers, who have mapped glacial sediments within the glaciated portion of the Allegheny Plateau, have noted the occurrence of isolated diamicts having a pink coloring and containing more carbonate minerals than their surrounding gray diamicts. A large continuous exposure in a strip mine near North Lima, Mahoning County, Ohio, provides an opportunity to examine the physical relationship of pink diamicts to gray ones. Pink layers of diamict tend to thicken, thin and bifurcate; pink blebs of diamict also occasionally appear within the gray diamicts, and may also surround clasts within gray layers. The pink layers range from a few mm to approximately 80 cm in thickness and extend for more than 20 m laterally. The texture, carbonate and clay mineralogy, and elemental composition of samples of pink and gray diamicts were examined for major differences. More variation was found in the sand fractions of gray samples than in those of pink samples. Pink samples average 31% sand, 43% silt, and 26% clay, whereas gray samples contain 55% sand, 27% silt, and 18% clay; differences are statistically significant at P ≤ 0.05. Pink diamicts have more total carbonate (% < 0.074 mm) in the medium-sand to silt fractions, but contains 6.6% total carbonate compared to 5.2% for gray diamicts. Diffraction intensity ratios (DI) of illite to kaolinite and chlorite average 1.1 for pink diamict and 0.9 for gray diamicts; this difference is statistically significant. A 32-element chemical analysis of both the sand and fine fractions shows that composition of pink diamicts differs significantly from that of gray diamicts in 7 of 25 comparisons for the sand fractions and 12 of 25 for the fine fractions. Both sand and fine fractions contained significantly different amounts of Al, Ba, K, Mg, and V. Geometry and laboratory analyses of diamicts at this site suggest that pink diamicts have a source in the Queenston and Grimsby formations of the Niagara Peninsula. Eroded blocks of these formations may have been transported englacially and smeared out along shear planes in thrust-stacked gray units in the terminus of the Illinoian Titusville ice.
John Szabo, PhD (Advisor)
147 p.
Geochemistry; Geology
Ohio; glaciation; Titusville Till; thrust-stacking; Mahoning County

Recommended Citations

Citations

  • Franko, B. J. (2008). Mineralogy and Provenance of Pink Inclusions in the Illinoian Titusville Till, Mahoning County, Eastern Ohio [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1216230710

    APA Style (7th edition)

  • Franko, Belinda. Mineralogy and Provenance of Pink Inclusions in the Illinoian Titusville Till, Mahoning County, Eastern Ohio. 2008. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1216230710.

    MLA Style (8th edition)

  • Franko, Belinda. "Mineralogy and Provenance of Pink Inclusions in the Illinoian Titusville Till, Mahoning County, Eastern Ohio." Master's thesis, University of Akron, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1216230710

    Chicago Manual of Style (17th edition)

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© 2008, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.