Rock Elm Disturbance

Rock Elm Disturbance

The Rock Elm Disturbance is a meteorite impact crater in Wisconsin, United States, roughly 40 kilometers Southwest of Menomonie. The disturbance is named for Rock Elm, Wisconsin, a nearby community.

The meteorite is estimated to have been 170 meters in diameter with a mass of 9x109 kg and impact velocity of 30 km/second. The crater is 6 km in diameter, and fossils found in the rock filling the crater suggest it dates to the middle Ordovician Period, about 455 to 430 million years ago. [cite journal
year=2002
title=Paleontology of the Rock Elm Disturbance
journal=Abstracts with Programs - Geological Society of America
volume=34 | issue=2 | pages=95
url=http://gsa.confex.com/gsa/2002NC/finalprogram/abstract_32679.htm
author=Peters, Christopher William, Middleton, Michael D., & Cordua, William S.]

References

External links

* [http://www.geotimes.org/mar04/NN_Wisccrater.html Article] from Geotimes.com, March 2004
* [http://www.uwrf.edu/news_bureau/0913022.html Press release] from the University of Wisconsin-River Falls
* [http://www.unb.ca/passc/ImpactDatabase/ Earth Impact Database]
* [http://www.seagrant.wisc.edu/MadisonJASON/Default.aspx?tabid=1468 Craters in Wisconsin]


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