Rockmyworld Posted November 9, 2023 Share Posted November 9, 2023 Hello everyone, I found this hunk of rock and from my amaturish research I think it's a brecia of various quartz, muscovite and maybe pyrite and sulfides (black stuff?) and was ejected from a meteorite impact. Specimen was located along the lakeshore of Lake Winnipeg along with another identical specimen smaller in size in a different location nearby. I know a fresh cross section would be helpful but I dont want to damage the pieces as I only have two. Any help would be much appreciated. Thank you Link to comment Share on other sites More sharing options...
echidna Posted November 10, 2023 Share Posted November 10, 2023 Looks like just an ordinary piece of slightly water worn granite to me. Nothing special. Link to comment Share on other sites More sharing options...
Geologyhound Posted November 10, 2023 Share Posted November 10, 2023 Looks like a typical mineral assemblage for a potassium feldspar granite with some larger grain sizes indicative of slower cooling. I don’t see any radial fracturing, tektite glass, or melted areas with a glassy appearance. The individual clear grains mixed in with the other minerals would be quartz, not glass. Link to comment Share on other sites More sharing options...
Rockmyworld Posted November 10, 2023 Author Share Posted November 10, 2023 Thanks for the information GeologyHound, you gave me some terms to google to help know what to look for. Link to comment Share on other sites More sharing options...
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