GoldFever Posted January 14, 2008 Share Posted January 14, 2008 Hello, I was breaking rocks in Ulster County, NY (Kingston Area) trying to find some fossils. I broke open a big rock and this perfectly round rock fell out. I dont know what it is. It is 2 inches about the roundness of a quarter. Then I found the other fossil. Dont know what it is either. Any Ideas? Link to comment Share on other sites More sharing options...
mosasaur Posted January 14, 2008 Share Posted January 14, 2008 The conical fossil looks like Tentaculites, which I believe is thought to be a worm (in the broader sense of the word). I have collected these in tennessee, in what I believd to be Silurian sediments. What age is the formation where you got these? The round specimen might be a sponge, or maybe it's inorganic. I don't see any features (I just looked at the thumbnail) - are there any? Kenneth Quinn Link to comment Share on other sites More sharing options...
GoldFever Posted January 14, 2008 Author Share Posted January 14, 2008 The conical fossil looks like Tentaculites, which I believe is thought to be a worm (in the broader sense of the word). I have collected these in tennessee, in what I believd to be Silurian sediments. What age is the formation where you got these? The round specimen might be a sponge, or maybe it's inorganic. I don't see any features (I just looked at the thumbnail) - are there any? Kenneth Quinn I dont know what formation they are from. How do you tell? Link to comment Share on other sites More sharing options...
Guest solius symbiosus Posted January 14, 2008 Share Posted January 14, 2008 I'm think it looks like a crinoid stem that has weathered on a plane that is inclined to the long axis of the stem. Tentaculites usually has "ridges" at the segments. I dont know what formation they are from. How do you tell? The easiest way is to reference a geologic map for that area. I don't know how well the state is mapped, but if you can get a 7 1/2 min quad for that area, it will come in very useful. Link to comment Share on other sites More sharing options...
ebrocklds Posted January 14, 2008 Share Posted January 14, 2008 i woudl say the round one is just a concretion without further information. the other i also believe is a eroded crinoid stem. brock Link to comment Share on other sites More sharing options...
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