Jay79 Posted January 19, 2019 Share Posted January 19, 2019 Hi all, this rock has been in the yard since the 50's at grandmas house. It was originally found in the Grand Canyon around that time on a trip. I'm no archeologist so I'm here for expert opinions as this rock looks very different to me( egg like ). It's about 5x7" and weighs about 8lbs. I have held on to it over the years just because it looks so peculiar to me. Thanks for your time or sorry for wasting it. Link to comment Share on other sites More sharing options...
RJB Posted January 19, 2019 Share Posted January 19, 2019 An interesting looking rock for sure, but my guess is its just a rock. Would be even more interesting to see the insides? RB Link to comment Share on other sites More sharing options...
caldigger Posted January 19, 2019 Share Posted January 19, 2019 Looks like a river tumbled stone to me. Perhaps one that was caught up in a boil hole which would account for the roundness of the piece. 2 Link to comment Share on other sites More sharing options...
Rockwood Posted January 19, 2019 Share Posted January 19, 2019 Yale Peabody's hole. Link to comment Share on other sites More sharing options...
Jay79 Posted January 20, 2019 Author Share Posted January 20, 2019 1 hour ago, RJB said: An interesting looking rock for sure, but my guess is its just a rock. Would be even more interesting to see the insides? RB Yes I was thinking about that as well but unsure on how or what the best method would be to do so? Link to comment Share on other sites More sharing options...
Jay79 Posted January 20, 2019 Author Share Posted January 20, 2019 1 hour ago, caldigger said: Looks like a river tumbled stone to me. Perhaps one that was caught up in a boil hole which would account for the roundness of the piece. Yes that would make sense. What about the leathery textured appearance? It looks as if it was soft at one time? Link to comment Share on other sites More sharing options...
abyssunder Posted January 20, 2019 Share Posted January 20, 2019 I'm pretty sure it is a rock with hight silica content, and it was tumbled for a long time according to its roundness and percussion marks visible on the surface. 2 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
ynot Posted January 20, 2019 Share Posted January 20, 2019 You will need a rock saw to cut it or a hammer to shatter it. The texture is caused by different hardnesses within the rock (he softer parts weather out quicker) and impact damage (from hitting other rocks while tumbling). 2 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Rockwood Posted January 20, 2019 Share Posted January 20, 2019 5 minutes ago, ynot said: You will need a rock saw to cut it or a hammer to shatter it. Safety glasses ! Those shards really whizz. 1 Link to comment Share on other sites More sharing options...
Jay79 Posted January 20, 2019 Author Share Posted January 20, 2019 3 minutes ago, ynot said: You will need a rock saw to cut it or a hammer to shatter it. The texture is caused by different hardnesses within the rock (he softer parts weather out quicker) and impact damage (from hitting other rocks while tumbling). Oh OK. It's a cool looking rock I'd hate to destroy it. Plus its been around so long its like family now haha. 1 Link to comment Share on other sites More sharing options...
Jay79 Posted January 20, 2019 Author Share Posted January 20, 2019 Just now, Rockwood said: Safety glasses ! Those shards really whizz. Yes always, only one pair of eyes. Link to comment Share on other sites More sharing options...
ynot Posted January 20, 2019 Share Posted January 20, 2019 1 minute ago, Jay79 said: its been around so long Dinosaur bowling ball? Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Jay79 Posted January 20, 2019 Author Share Posted January 20, 2019 2 minutes ago, ynot said: Dinosaur bowling ball? Haha, perhaps so Link to comment Share on other sites More sharing options...
abyssunder Posted January 20, 2019 Share Posted January 20, 2019 If you try to compare the surface patterns of your specimen with the samples below, I think you may find a proper resemblance. reference: W.U. Reimold & R.C.A. Minnitt .1996. Impact-induced shatter cones or percussion marks on quartzites of the Witwatersrand and Transvaal Supergroups. South African Journal of Geology 99(3): 299-308 1 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
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