Jarl 5 Posted October 29, 2018 Hello, Would appreciate any ID-eas on what I have here ... Context: Creek Side Sand Bar. East/Central Iowa. A lot of what we have here is glacial deposition/drift-till I believe...so most likely it was left and not formed here. There were similar nodular specimens in the same area, with the same vesicular characteristics. Tests Performed: None. I have not streaked, burned, SG'd, HCI'd or properly MOHS'd it yet...though I did use a scissor blade(because Im lazy and it was close)to scratch what appears to be a denser, perhaps more vitrified(?) portion, and they did not scratch it. Hypothesis: A volcanic spindle bomb Initial Basis: Shape, exterior texture...because internet said so... Alt Hyps: Concretion, extraterrestrial, some dumb thing, petrified bread dough, coral fossil... Thanks for looking. ~ jarl Quote Share this post Link to post Share on other sites
4meter 182 Posted October 29, 2018 Piece of quartz. Quote Share this post Link to post Share on other sites
