grace-angel Posted September 4, 2017 Share Posted September 4, 2017 I saw that fossil online today and i have no idea what it can be... It was under the tag of ammonite,can it be fossil wood? The rings remind me Petrified wood but it cleaner then every petrified wood i ever saw,what can it be? Link to comment Share on other sites More sharing options...
sixgill pete Posted September 4, 2017 Share Posted September 4, 2017 Not sure, it could be wood but the rings do not look quite right to me. Whatever it is, it has been polished and is really nice looking. Bulldozers and dirt Bulldozers and dirt behind the trailer, my desert Them red clay piles are heaven on earth I get my rocks off, bulldozers and dirt Patterson Hood; Drive-By Truckers May 2016 May 2012 Aug 2013, May 2016, Apr 2020 Oct 2022 Link to comment Share on other sites More sharing options...
Miocene_Mason Posted September 4, 2017 Share Posted September 4, 2017 This is a banded agate I think, they form in holes in the rock and because it's deposited by water with different concentrations of minerals, it has a different color each ring. I have a nice red slice somewhere, they are very pretty! “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
ynot Posted September 4, 2017 Share Posted September 4, 2017 Definitely a banded agate nodule. This type of rock forms in volcanic formations and is not a fossil. 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...
Darko Posted September 5, 2017 Share Posted September 5, 2017 Crystal geode? Link to comment Share on other sites More sharing options...
Macrophyseter Posted September 6, 2017 Share Posted September 6, 2017 8 hours ago, Darko said: Crystal geode? close, but you would call this a nodule because it's not hollow. Geodes and crystal nodules are quite similar, except that geodes are hollow and have crystal-shaped crystals while nodules are pretty much crystal material filled to the core (well the nodule I'm talking about, which is also called thunder eggs). Also, I agree on banded agate as well. If you're a fossil nut from Palos Verdes, San Pedro, Redondo Beach, or Torrance, feel free to shoot me a PM! Link to comment Share on other sites More sharing options...
ynot Posted September 6, 2017 Share Posted September 6, 2017 8 hours ago, Darko said: Crystal geode? A "geode" is a generic term used to describe a hollow often crystal lined rock (usually agate) Thunder eggs are a specific type of volcanic rock that can have a hollow center and thus be called a geode also. Agate will often fill the holes left by gas bubbles formed when the lava/magma cooled. This forms an agate nodule which can also be called a geode if it is hollow inside. The rock in question is not a geode because it does not have a hollow center. It is not a thunder egg because it does not have the rind that is associated with thunder eggs. 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...
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