Gen. et sp. indet. Posted July 16, 2018 Share Posted July 16, 2018 I thought it to be a wood, but was told it's rather a sponge or coral. What do you think? Can you identify the form-genus of the plant if it is one? I found this flint specimen in a parking lot gravel in southern Poland, therefore I'm not sure of the age. There are some other flints there, with possibly a late Late Cretaceous - early Early Paleogene fauna, while nearby outcroups are of late Middle to early Late Jurassic with flints, early Late Cretaceous with cherts and Miocene without silifications. Fossil wood in Poland preserved as a flint, found on secondary deposits, is often of Miocene age. Link to comment Share on other sites More sharing options...
caldigger Posted July 16, 2018 Share Posted July 16, 2018 Seems more on the spoongy side. Great detail on it. Link to comment Share on other sites More sharing options...
GeschWhat Posted July 16, 2018 Share Posted July 16, 2018 I vote wood. It looks like wood preservation I've seen from the Aachen Formation in Germany which is Late Cretaceous. I was primarily interested in the coprolites (white), but have not been able to identify plant species. Lori www.areallycrappystory.com/fossils www.facebook.com/fossilpoo Link to comment Share on other sites More sharing options...
Carl Posted July 17, 2018 Share Posted July 17, 2018 It sure looks like wood but I don't know if I've ever seen the cellular structure in a macro shot. Hmmm.... Link to comment Share on other sites More sharing options...
ynot Posted July 17, 2018 Share Posted July 17, 2018 I agree that it is petrified plant, but think it is fern (?). Can We see other sides? 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...
Gen. et sp. indet. Posted July 18, 2018 Author Share Posted July 18, 2018 More views of the same sample as in the first post. Link to comment Share on other sites More sharing options...
Carl Posted July 18, 2018 Share Posted July 18, 2018 I totally agree that it looks most like wood, but jeez, that scale is still making me scowl. Might this be a bryozoan? Link to comment Share on other sites More sharing options...
Gen. et sp. indet. Posted July 18, 2018 Author Share Posted July 18, 2018 Another specimen from the same parking lot gravel. Link to comment Share on other sites More sharing options...
ynot Posted July 18, 2018 Share Posted July 18, 2018 Last piece looks like a metamorphic rock, not a fossil. 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...
Gen. et sp. indet. Posted July 18, 2018 Author Share Posted July 18, 2018 1 minute ago, ynot said: Last piece looks like a metamorphic rock, not a fossil. Must be the quality of the photo. It's a chert/flint. Link to comment Share on other sites More sharing options...
Gen. et sp. indet. Posted July 18, 2018 Author Share Posted July 18, 2018 As for my first specimen, I'm beginning to see some resemblence between those light and dark spots and rods in Palmoxylon. What do you think? https://uwaterloo.ca/earth-sciences-museum/sites/ca.earth-sciences-museum/files/uploads/images/4_12.png Link to comment Share on other sites More sharing options...
ynot Posted July 18, 2018 Share Posted July 18, 2018 19 minutes ago, Gen. et sp. indet. said: Must be the quality of the photo. It's a chert/flint. Quartzite maybe, but not chert or flint. 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...
Carl Posted July 18, 2018 Share Posted July 18, 2018 Structure's much closer to true wood - it's all wrong for Palmoxylon: 1 Link to comment Share on other sites More sharing options...
MikeD Posted July 18, 2018 Share Posted July 18, 2018 I would say that this is wood or some "woody" plant. It bears a strong resemblance to an Eocene wood found in Texas, Mennegoxylon jonesii, locally known as "snake wood". Its name comes from the unique pattern created by the parenchyma in when viewed in cross section. Not much is known about this wood and there is only one publication on it that I am aware of. A nice and interesting piece. 1 Link to comment Share on other sites More sharing options...
GeschWhat Posted July 19, 2018 Share Posted July 19, 2018 10 hours ago, Gen. et sp. indet. said: Another specimen from the same parking lot gravel. Can you take a picture of the first two views of this when wet? Lori www.areallycrappystory.com/fossils www.facebook.com/fossilpoo Link to comment Share on other sites More sharing options...
Gen. et sp. indet. Posted July 19, 2018 Author Share Posted July 19, 2018 3 hours ago, GeschWhat said: Can you take a picture of the first two views of this when wet? Here are some additional pictures. It's raining here all the time, so it's hard to make a sharp picture with my cell phone. 14 hours ago, ynot said: Last piece looks like a metamorphic rock, not a fossil. 14 hours ago, ynot said: Quartzite maybe, but not chert or flint. I cannot agree with that, but let's here the others... Link to comment Share on other sites More sharing options...
ynot Posted July 19, 2018 Share Posted July 19, 2018 2 minutes ago, Gen. et sp. indet. said: cannot agree with that, but let's here the others... Chert and flint are fine grained cryptocrystalline quartz with a conchoidal fracture. This piece shows a medium grain and an uneven fracture. 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...
Gen. et sp. indet. Posted July 19, 2018 Author Share Posted July 19, 2018 43 minutes ago, ynot said: Chert and flint are fine grained cryptocrystalline quartz with a conchoidal fracture. This piece shows a medium grain and an uneven fracture. Agree, but isn't it that silicified wood doesn't have conchoidal fracture and instead break, more or less, along anatomical surfaces? Plus the rock seems to be a pebble weathered by a water action. Also, the piece either show a medium grain, or vascular tissue preservation. There are clearly two size classes of the 'grains', and they have a very regular, stable outline. Compare with: http://petrifiedwoodmuseum.org/AnatomyAngiospermVessels.htm Or... you might be just right Just thinking loud. Thank you for the input into the discussion. Link to comment Share on other sites More sharing options...
Gen. et sp. indet. Posted July 19, 2018 Author Share Posted July 19, 2018 18 hours ago, Carl said: Structure's much closer to true wood - it's all wrong for Palmoxylon: Ok, so at least it's clear now it's not a palm 'wood'. Link to comment Share on other sites More sharing options...
Carl Posted July 19, 2018 Share Posted July 19, 2018 Love your screen name. by the way. 1 Link to comment Share on other sites More sharing options...
ynot Posted July 19, 2018 Share Posted July 19, 2018 7 hours ago, Gen. et sp. indet. said: , but isn't it that silicified wood doesn't have conchoidal fracture and instead break, more or less, along anatomical surfaces? No, silicified (agatized) wood will have a conchoidal fracture. 7 hours ago, Gen. et sp. indet. said: Plus the rock seems to be a pebble weathered by a water action. Yes,but it still does not show any conchoidal fracture. 7 hours ago, Gen. et sp. indet. said: the piece either show a medium grain, or vascular tissue preservation. I see no "vascular tissue preservation", only medium grained quartzite. 7 hours ago, Gen. et sp. indet. said: There are clearly two size classes of the 'grains', and they have a very regular, stable outline. I do not see what You are seeing. Your piece does not show a cellular structure at all. I also see no "regular stable outline" (whatever that is.}. The first piece posted shows an even cellular structure and has a clearly visible conchoidal fracture. 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...
Gen. et sp. indet. Posted July 19, 2018 Author Share Posted July 19, 2018 Yet another specimen from the same gravel. Link to comment Share on other sites More sharing options...
paleoflor Posted July 19, 2018 Share Posted July 19, 2018 The first and third specimens appear to be hardwoods, given the presence of pores/vessels. For a detailed identification you would need to create cross-sections showing axial, tangential and radial views. The second specimen presents a (metamorphic) rock texture, rather than petrified wood, for as far as I can tell from the photographs. 1 Searching for green in the dark grey. Link to comment Share on other sites More sharing options...
Carl Posted July 19, 2018 Share Posted July 19, 2018 That certainly looks like petrified wood. 1 Link to comment Share on other sites More sharing options...
GeschWhat Posted July 23, 2018 Share Posted July 23, 2018 You second specimen is interesting, but I don't see anything that looks like wood. It almost looks like it contains both individual and compacted fecal pellets. One even looks a hexagonal (see last wet photo) which is suggestive of a termite coprolite. However, the rock itself doesn't look like wood. My guess is geological for that one. Your last photo looks like petrified wood to me. Lori www.areallycrappystory.com/fossils www.facebook.com/fossilpoo Link to comment Share on other sites More sharing options...
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