K-Pg and Shatter Cones
Sciencemall-USA is an online science mall store with shatter cones, impact material, and K-T, K-Pg boundary clay. These geological specimens are found at world meteorite, asteroid, and comet impact sites. So far, the Earth Impact Database lists 190 confirmed impact sites. Evidence for these impact sites varies. Some are found with shatter cones; others are not. Some impact sites have only the evidence of planar deformation features (pdf's) or stressed and deformed shocked quartz. Of these impact sites, some are confirmed, others are only suspected.
We sell professionally collected shatter cones, impact material, tektites, microtektites, high-pressure/temperature minerals, and K-T or K-Pg boundary clay.