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Shatter Cone Glover Bluff, WI
Great Shatter Cone from Glover Bluff, Wisconsin - New!
This is a great shatter cone found at the Glover Bluff impact site with distinctive horsetailing.
About Glover Bluff - Glover Bluff is a meteorite crater located about 4 miles from Colona, WI, USA. It is 5 miles in diameter and its age is estimated to be less than 500 million years (Cambrian or younger). The crater is exposed at the surface and this impact site is one of the least studied in the world, in part because for years the uplifted central area has been actively quarried for dolomite beneath the moraine left by retreating glaciers. Ironically, the very evidence supporting a meteoritic impact uncovered in the quarrying process is systematically being destroyed.
Evidence for the Glover Bluff impact site includes: a central bulge, dipped strata, the presence of “shatter cones” (although no longer as common as they may once have been), and, “impact breccia.” There are “red” and “yellow” varieties (more of a brick red and tan yellow) and sometimes a mixture of the two. The breccia contains many broken fragments (or shards) of quartzite and other rocks.
This great shatter cone was formed in yellow dolomite and caused by an impact event that occurred at this site from a site where shatter cones are next to impossible to find. This shatter cone is superb and will be a distinctive addition to only a serious geological meteorite asteroid comet impact collection.
Size: 2 3/4" W X 3 1/4" H X 1" D, Weight: 199 grams
Ships with information, Certificate of Authenticity and tag. Cube and stands not included.
Click pictures to enlarge. Collected on a geological expedition by Jensan Scientifics.
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