Decaturville is an ancient meteorite impact crater located in Camden county Missouri. The impact event took place approx. 200-300 million years ago and the remnant crater is 6km wide. The violent impact pulverized the native bedrock and created the impact breccias that are found there today.
Rock Type: Monomict Breccia Composition: Probably in situ brecciated Lower Ordovician Jefferson City Dolomite. Locality: Ring Graben of Decaturville Impact Structure, Camden County, Missouri U.S.A. Approx. Dimensions: 2-7/16” long x 1-1/2” wide x 3/8” thick Approx. Weight: 68 grams