Decorah crater
| Decorah crater | |
|---|---|
Winneshiek | |
| Municipality | Decorah |
  Location of the crater in the United States | |
The Decorah crater, also called the Decorah impact structure, is a possible
Middle Ordovician
Period, circa 470 million years ago.
Description
The crater is estimated to be 3.5 miles (5.6 km) in diameter, covered by the
Rock Elm crater in Wisconsin, Slate Islands crater in Lake Superior, and Ames crater in Oklahoma.[6]
Pentecopterus decorahensis
The Middle Ordovician (
Pentecopterus decorahensis. Pentecopterus was scorpion-like in appearance, and the largest predator known from that time, measuring nearly 6 feet in length. Its species name was derived from "Decorah."[7]
Middle Ordovician impact craters, which may be part of the Ordovician meteor event. Key: 1: Ames crater, 2: Decorah crater, 3: Rock Elm Disturbance, 4: Slate Islands crater
.See also
References
- ^ Mikheeva, Anna. 2017. The Complete Catalog of the Earth's Impact structures, 1. Russian Academy of Sciences. Accessed 2017-10-14.
- ^ Vastag, Brian (18 February 2013). "Crater found in Iowa points to asteroid break-up 470 million years ago". The Washington Post. Retrieved 19 February 2013.
- ^ Cedar Rapids Gazette. 5 March 2013. Retrieved 6 March 2013.
- ^ US Geological Survey. "Iowa Meteorite Crater Confirmed". Retrieved 7 March 2013.
- ^ Iowa Department of Natural Resources. "GEOLOGIC MAPPING FOR WATER QUALITY PROJECTS IN THE UPPER IOWA RIVER WATERSHED" (PDF). Technical Information Series No. 54, 2011. Retrieved 19 February 2013.[permanent dead link]
- PMID 15254530.
- PMID 26324341.
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