mcurasco8 Posted April 3, 2009 Share Posted April 3, 2009 I found this rock in North Central Pennsylvania (Tioga County) and I'm trying to find an identification. There's a good chance its a piece of pumice because of its extremely light weight. Its slightly larger than a golf ball in size. However the rock has more to it than just pumice like characteristics. Anyone have a guess? Link to comment Share on other sites More sharing options...
Auspex Posted April 3, 2009 Share Posted April 3, 2009 Maybe cinder/slag? Old iron foundries and even glass factories turned out a lot of stuff that looks like that. "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
tracer Posted April 3, 2009 Share Posted April 3, 2009 I found this rock in North Central Pennsylvania (Tioga County) and I'm trying to find an identification. There's a good chance its a piece of pumice because of its extremely light weight. Its slightly larger than a golf ball in size. However the rock has more to it than just pumice like characteristics. Anyone have a guess? dunno. does it seem microvesicular? <he said, trying desperately to look nonchalant as if he hadn't just looked that word up> Link to comment Share on other sites More sharing options...
tuscarora-th Posted April 3, 2009 Share Posted April 3, 2009 I thinkAuspex hit it right. being from pa I collected many of these igneous looking rocks as a kid. Just a byproduct of the hundreds of iron smelting furnaces we have in our state. Mike Link to comment Share on other sites More sharing options...
PaleoRon Posted April 3, 2009 Share Posted April 3, 2009 It does look like some kind of slag. I was thinking coke from the description but the coke I have seen is much more vascular/frothy/bubbly. Coke is reduced coal so if it is coke it will burn at high temperatures. Link to comment Share on other sites More sharing options...
mcurasco8 Posted April 3, 2009 Author Share Posted April 3, 2009 Thanks for the quick replies. M Link to comment Share on other sites More sharing options...
MikeD Posted April 3, 2009 Share Posted April 3, 2009 dunno. does it seem microvesicular? <he said, trying desperately to look nonchalant as if he hadn't just looked that word up> Well, being microvesicular (assuming that tracer is not talking about some kind of reversal), pumice will float in water. Looks like some kind of slag/cinder to me, too. Link to comment Share on other sites More sharing options...
Frank Menser Posted April 4, 2009 Share Posted April 4, 2009 Well, being microvesicular (assuming that tracer is not talking about some kind of reversal), pumice will float in water. Looks like some kind of slag/cinder to me, too. Exactly. I have to agree with the above. What set Pumice apart from typical lava rock is the floaring. Also Pumice usually has a sponge-like appearance. Be true to the reality you create. Link to comment Share on other sites More sharing options...
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