Discovery of microscopic evidence for shock metamorphism at the Serpent Mound structure, south-central Ohio: Confirmation of an origin by impact
Earth and Planetary Science Letters
By: R.W. Carlton, C. Koeberl, M.T. Baranoski, and G.A. SchuMacHer
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Abstract
The origin of the Serpent Mound structure in south-central Ohio has been disputed for many years. Clearly, more evidence was needed to resolve the confusion concerning the origin of the Serpent Mound feature either by endogenic processes or by hypervelocity impact. A petrographic study of 21 samples taken from a core 903 m long drilled in the central uplift of the structure provides evidence of shock metamorphism in the form of multiple sets of planar deformation features in quartz grains, as well as the presence of clasts of altered impact-melt rock. Crystallographic orientations of the planar deformation features show maxima at the shock-characteristic planes of {101??3} and {101??2} and additional maxima at {101??1}, {213??1}, and {516??1}. Geochemical analyses of impact breccias show minor enrichments in the abundances of the siderophile elements Cr, Co, Ni, and Ir, indicating the presence of a minor meteoritic component.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Discovery of microscopic evidence for shock metamorphism at the Serpent Mound structure, south-central Ohio: Confirmation of an origin by impact |
| Series title | Earth and Planetary Science Letters |
| DOI | 10.1016/S0012-821X(98)00166-6 |
| Volume | 162 |
| Issue | 1-4 |
| Year Published | 1998 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Earth and Planetary Science Letters |
| First page | 177 |
| Last page | 185 |
| Google Analytic Metrics | Metrics page |