Peat Burns Posted February 5, 2018 Share Posted February 5, 2018 @ynot et al. How would you characterize this rock? It's about 2 lbs and has dimensions of 4-1/8" x 2-1/2" x 3". Heavy, but does not attract to magnet. I am calling it an "iron-rich concretion". From glacial deposits in Michigan. Thoughts? Link to comment Share on other sites More sharing options...
Peat Burns Posted February 5, 2018 Author Share Posted February 5, 2018 Link to comment Share on other sites More sharing options...
ynot Posted February 5, 2018 Share Posted February 5, 2018 Looks like an iron concretion to Me. (To all of Us.) 1 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...
Peat Burns Posted February 5, 2018 Author Share Posted February 5, 2018 5 minutes ago, ynot said: Looks like an iron concretion to Me. (To all of Us.) ok. thanks Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted February 5, 2018 Share Posted February 5, 2018 Yup, iron concretion. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Peat Burns Posted February 5, 2018 Author Share Posted February 5, 2018 1 minute ago, Tidgy's Dad said: Yup, iron concretion. Thank you, TD. Link to comment Share on other sites More sharing options...
abyssunder Posted February 5, 2018 Share Posted February 5, 2018 I would call it ironstone or stony-iron. Can you determine if the white material is silicate or not? " 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...
Peat Burns Posted February 5, 2018 Author Share Posted February 5, 2018 3 minutes ago, abyssunder said: I would call it ironstone or stony-iron. Can you determine if the white material is silicate or not? Thanks, abyssunder. Unfortunately, I have not held the specimen in hand. The pics were emailed to me for ID. The gentleman thinks it's a planetary meteorite. I knew right away it was not. I hate to be the bearer of bad news to him. But more often than not, I have to tell people that what they have is not a meteorite, fossil egg, dinosaur bone, mammoth bone, etc., etc. . Hate that. They are so disappointed... Link to comment Share on other sites More sharing options...
abyssunder Posted February 6, 2018 Share Posted February 6, 2018 That was the reason why I asked for the silicate sometimes present in some type of meteorites, but I think the specimen is not one of them, because it has vesicles not characteristic to meteorites with high iron content. A few weeks ago I've seen on the sale sites of the internet a very similar specimen, unfortunately I haven't made a copy of that picture and I can't find it anymore. Seller listed as a warn iron concretion (maybe from glacial deposit), I can't remember correctly. 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...
Plax Posted February 7, 2018 Share Posted February 7, 2018 Every rock with an orange rind is not an ironstone concretion. Sometimes the interior is not iron at all. Same with black "phosphatic" concretions. They have black on the outside but may be any number of minerals or fossil on the interior. This one is probably iron through and through but wanted to point this distinction out. 1 Link to comment Share on other sites More sharing options...
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