Editing St. Helena Parish, Louisiana (section)

==Brushy Creek Crater==
St. Helena Parish contains the only identified [[meteorite]] [[impact crater]] in the state of Louisiana. This suspected impact crater is a roughly circular depression about 1.2 miles/2&nbsp;km in diameter. Shocked quartz and intensely fractured quartz have been recovered from fractured and possibly altered sediments comprising its rim. Its age is estimated to be between 11 and 30 [[kiloannum|ka]].<ref name="Heinrich2003a"/> It lies about 5.8 miles/9.3 kilometers southwest of [[Greensburg, Louisiana|Greensburg]], in the southwest corner of the parish. Louisiana Highway 37 cuts through the northern edge of this feature.<ref name="Heinrich2003a">Heinrich, P.V. (2003) [http://www.searchanddiscovery.net/documents/2003/heinrich/index.htm Possible Meteorite Impact Crater in St. Helena Parish, Louisiana.] Search and Discovery Article. no. 50006. American Association of Petroleum Geologist, Tulsa, Oklahoma. Retrieved March 27, 2011.</ref><ref name="Heinrich2003c">Heinrich, P.V. (2003) [https://www.scribd.com/doc/19128408/Geology-of-Brushy-Creek-Impact-Crater-St-Helena-Parish-LA Origin of a Circular Depression and Associated Fractured and Shocked Quartz, St. Helena Parish, LA.] Transactions of the Gulf Association of Geological Societies. vol. 53, pp. 313-322.</ref><ref>[http://www.enrg.lsu.edu/node/460 LGS Researcher Featured in Meteor Crater News Story.] {{webarchive|url=https://web.archive.org/web/20120321203607/http://www.enrg.lsu.edu/node/460|date=March 21, 2012}} Center for Energy Studies, Louisiana State University Baton Rouge. Retrieved March 27, 2011.</ref>