Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


ohiou1276614508.pdf (7.33 MB)

ETD Abstract Container

Abstract Header

An Anomalous Breccia in the Mesoproterozoic (~1.1 Ga) Atar Group, Mauritania: Endogenic vs. Exogenic Genesis

Aden, Douglas J.
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1276614508

Abstract Details

2010, Master of Science (MS), Ohio University, Geological Sciences (Arts and Sciences).
The Tawaz Breccia (TB) is an anomalous breccia within the Mesoproterozoic (~1.1 Ga) Atar Group on the West African Craton (WAC). This unit is unusual because its sedimentary features record a high energy event in an otherwise calm shallow marine depositional environment. In order to determine a depositional type for this unit, breccia types produced by common geologic processes (described through an extensive literature search) were evaluated for their statistical correlation with initial field observations of the TB. This analysis has shown that breccias generated by either an impact or non-impact tsunami correlate best with the TB. Geochemical analyses on a suite of samples collected during reconnaissance field work were used to discriminate between these two tsunami types. Os and Re concentrations and the ratios of 187Os/188Os and 187Re/188Os demonstrate that TB values correlate with impact mixtures and terrestrial materials. Therefore, although the TB was likely formed by a tsunami, preliminary analyses can not completely eliminate the possibility that the tsunami was triggered by an impact event (of possible iron composition).
Keith Milam, PhD (Advisor)
Dave Kidder, PhD (Committee Member)
Doug Green, PhD (Committee Member)
Damian Nance, PhD (Committee Member)
101 p.
Geology
Mauritania; breccia; tsunami; impact; rhenium; osmium

Recommended Citations

Citations

  • Aden, D. J. (2010). An Anomalous Breccia in the Mesoproterozoic (~1.1 Ga) Atar Group, Mauritania: Endogenic vs. Exogenic Genesis [Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1276614508

    APA Style (7th edition)

  • Aden, Douglas. An Anomalous Breccia in the Mesoproterozoic (~1.1 Ga) Atar Group, Mauritania: Endogenic vs. Exogenic Genesis. 2010. Ohio University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1276614508.

    MLA Style (8th edition)

  • Aden, Douglas. "An Anomalous Breccia in the Mesoproterozoic (~1.1 Ga) Atar Group, Mauritania: Endogenic vs. Exogenic Genesis." Master's thesis, Ohio University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1276614508

    Chicago Manual of Style (17th edition)

ohiou1276614508
1,168
© 2010, all rights reserved.
This open access ETD is published by Ohio University and OhioLINK.