Mathematics – Logic
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusm.p41a..04b&link_type=abstract
American Geophysical Union, Spring Meeting 2008, abstract #P41A-04
Mathematics
Logic
5420 Impact Phenomena, Cratering (6022, 8136)
Scientific paper
Examination of the geologic map of Arizona shows map patterns in east-central Arizona suggestive of the circular morphology of impact structures. The circular morphology is expressed in the trends of bedrock outcrop contacts, prominent surface fractures and drainage patterns. Two features are apparent, herein designated as C-NW and C-SE. Data analysis focused on examination of geologic map patterns, fracture pattern analysis, and interpretation of residual Bouguer gravity profiles. Of the two potential impact sites, C-NW shows a stronger signature that is in variance with regional patterns than does C-SE. Furthermore the examination of the data also suggests a strong surficial, geologic, and geophysical correlation of C-NW with other known impact structures. A comparison was made of the data for C-NW to the characteristics of other circular structures of an igneous or tectonic origin such as pull-apart or igneous withdrawal basins. The regional geology favors none of the alternate origins for the circular structures further strengthening an impact structure origin for C-NW.
Beach M. E.
Brumbaugh D. S.
Helfrich E. P.
Millhouse A. M.
Roop H. A.
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