Kentland crater
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The Kentland structure, also known as the Kentland crater or the Kentland disturbed area, is an impact structure located near the town of Kentland in Newton County, Indiana, United States.
Deformation involving bending and overturning is evident in the layered limestones exposed by quarrying at the Kentland impact structure.
Pingualuit aerial 2007
Fission track dating
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Fission track dating is a radiometric dating technique based on analyses of the damage trails, or tracks, left by fission fragments in certain uranium-bearing minerals and glasses. Fission-track datin
Kentland crater
…Late Pennsylvanian Epoch (Carboniferous Period) of the Paleozoic Era This impact structure was studied in 1978. John Weber and his associates presented fission track dating of apatite from this impact structure. Coesite and shatter cones are found in the uplift near its center. The impact structure is exposed to the surface…
Etched fission tracks from uranium-238 in apatite. track lengths are approximately 17 microns.