Jbm1978 Posted March 4 Share Posted March 4 Hello, I found this yesterday on the beach at Lake Erie in Pa. I was wondering if anyone might know what it is. It’s worn smooth from the crashing waves as it was partially in the lake water. The brown part seems to have a fine porous to it and it is definitely something separate from the gray stone surrounding it. Thank you for any help. IMG_0740.mov 1 Link to comment Share on other sites More sharing options...
Fossildude19 Posted March 4 Share Posted March 4 This does not look like a fossil to me. Looks more geologic - like a clast with adhering matrix still attached to it. Wait for some other opinions, though. 2 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
DPS Ammonite Posted March 4 Share Posted March 4 Might be chert in limestone. See if the white and brown areas fizz in acid. My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
Jbm1978 Posted March 4 Author Share Posted March 4 I’m adding some more close up pictures to see if this helps. Link to comment Share on other sites More sharing options...
DPS Ammonite Posted March 4 Share Posted March 4 See how hard each type of rock is. Metal knife blade should not scratch the brown area if it is chert. White area, if limestone, should scratch; it also should fizz in acid. Let us know what the results of the tests are. My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
Jbm1978 Posted March 4 Author Share Posted March 4 (edited) Knife scratches both brown and gray. I don’t have acid unless there is a common household thing to use. Edited March 4 by Jbm1978 Link to comment Share on other sites More sharing options...
Kane Posted March 4 Share Posted March 4 Vinegar would be the acid to use to determine if it is limestone. ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
Jbm1978 Posted March 5 Author Share Posted March 5 (edited) I tried the vinegar and the gray rock bubbles. The weird thing was when I washed the vinegar off the rock the brown part bubbled from water seeping into it. I was also mistaken the knife didn’t scratch the brown part it just left a mark not an actual scratch. Edited March 5 by Jbm1978 Link to comment Share on other sites More sharing options...
DPS Ammonite Posted March 5 Share Posted March 5 You have a piece of limestone where silica partially replaced part of the limestone thus creating the chert nodules. They are very common. My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
Jbm1978 Posted March 5 Author Share Posted March 5 28 minutes ago, DPS Ammonite said: You have a piece of limestone where silica partially replaced part of the limestone thus creating the chert nodules. They are very common. Yeah I’m thinking it’s radiolarite. Link to comment Share on other sites More sharing options...
ClearLake Posted March 5 Share Posted March 5 21 hours ago, Jbm1978 said: Yeah I’m thinking it’s radiolarite. Unless you can see radiolarians in the silica, that may be attributing a little more precision to the identification than the rock warrants. Limestone and chert together do not necessarily mean radiolarite. https://geologyscience.com/rocks/sedimentary-rocks/non-clastic-sedimentary-rock/radiolarite/?amp 1 Link to comment Share on other sites More sharing options...
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