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  1. I found this piece of late Cretaceous petrified wood in the Dawson formation of Colorado. Most of the piece however is this grey ash colored rock and I was just wondering, 1. What type of rock is it? I’m willing to do tests such as scratch and hardness if it will help. 2. How was it formed? 3. When was it formed? Did it form during fossilization or much more recently? Thanks for any and all help.
  2. MarcoSr

    Petrified Wood Slabs

    I'm interested in petrified wood for the scientific value (wood where the cell structure is well preserved), for the aesthetic value (mineralized with vivid colors and crystal shapes), and for oddities (like fungus, insect borings etc.) contained in the wood. Below are three petrified wood slabs, from the United States, from my collection. The below individual slab pictures were taken with the slabs dry, indoors using my camera with flash. The close-up pictures were taken with my Dino-Lite digital microscope. If you want to see a lot more of the petrified wood pieces in my collection, check out my TFF thread at the below link: Petrified Wood, conifer, fungus Polyporites wardii, early Permian late Triassic 295 to 201 MYA, Chinle Formation, northern Arizona - 3.60 lbs. 10.5x8.75x0.53 inches Traditionally this petrified wood has been identified as Araucarioxylon arizonicum, a conifer tree. However,according to Wikipedia “ The validity of the name Araucarioxylon arizonicum has been questioned. A. arizonicum may actually be composed of several different genera and species. A 2007 study on the syntypes used by Knowlton in describing the species has revealed that they belonged to three species. They were tentatively reclassified as Pullisilvaxylon arizonicum, Pullisilvaxylon daughertii, and Chinleoxylon knowltonii. The genus Araucarioxylon may thus be superfluous and illegitimate; and the petrified logs of Petrified Forest National Park may be composed of a greater diversity than initially believed.” What makes this slab unique are the oval shaped patterns framing and permeating the piece, which are actually the fossil remains of a fungus (named Polyporites wardii), that invaded the ancient tree before it was fossilized. The fungus is preserved in barite (fungus is almost never seen because it doesn't preserve in silica the way wood does). Petrified Wood, Triassic 225 MYA, Chinle Formation near Holbrook, Arizona - 745g 160 x200x12mm This slab has incredible colors (purple, red, orange, yellow etc.) which is a major reason why Arizona petrified wood is highly desired by petrified wood collectors. Petrified Wood, early Eocene 50 MYA, Green River Formation, Blue Forest along ancient Lake Gosiute, Sweetwater County, Wyoming - 1.2 lbs. 8.5x6x.38 inches This slab has really nice wood preservation with a very well defined heart in the center and stunning wood grain. There is blue agate, with golden calcite filling some of the agate voids, some nice insect borings, as well as fossil ostracods near the rind. Per Viney 2020 The Blue Forest of Ancient Lake Gosiute Sweetwater County Wyoming “The lacustrine setting in which the silicified wood formed is contrasted with two geologic environments commonly associated with silicified wood deposits, trees transported by streams and rivers buried in fine-grained fluvial sediments of deltas and floodplains as well as lahars and ash produced from volcanic eruptions that bury trees. A recent scientific study of the Blue Forest fossil wood reveals that preservation occurred as a multistage mineralization process. The taphonomic sequence that included stromatolitic growth followed by wood desiccation and then exposure to mineral-laden waters is consistent with a playa-lake model for Lake Gosiute.” Marco Sr.
  3. Hello, As I'm not super familiar with petrified wood structures, I'm questioning if this is indeed a vertebrae creature that petrified along with the wood or just a a normal structure. It's little if so. Found either along the Mississippi River just north of St. Louis, MO or in a ravine surrounded by steep hills in the St. Louis County Suburb region. From what I read, Missouri Petrified Wood is from the Cretaceous Period. Any help if it is something and also maybe type of wood/tree? More images at: https://photos.app.goo.gl/qmZ7dtN5pPt75CSa7 Thank you!
  4. Hello. I offer for trade fragments of petrified wood of the Carboniferous period with crystals of smoky quartz. Some samples are in the photographs (I did not upload all the samples I have, since there are quite a few of them - of different sizes and qualities, as well as the sizes of the crystals themselves. I think we can agree on what specifically interests you - I have no doubt that I will find the sample you need). The origin of this wood is Ukraine, its age is Carbon. I'm interested in marine reptiles and petrified wood. Thank you. Have a nice day
  5. Crookstonj

    Greetings from Colorado

    A career in the military (38 yrs, USMC) has given us repeated exposure as we travel and move, to the mind-boggling beauty of Nature's creations. We especially seek out stromatolite specimens, petrified wood varieties and anything guaranteed to spark conversation when shared with friends and visitors. While we still find excitement in wandering through the outdoors, we also find rewards in visiting rock, fossil and mineral shows where the vendors themselves offer education and conversation that deepens our appreciation of their wares. Really pleased to be able to take advantage of this group's experience and expertise.
  6. Hi everyone. I've lived in the Willamette Valley all my life. Been a rockhound all my life love fossils, rocks and anything geology! I LOVE petrified wood and Amber.. I love finding the imprint of leaves on rock but I don't know what this is all called.. I am not sure what ANY of my finds are called. All my life when my family and friends and I would go camping or on outdoor events when the rest of the crowd was socializing or swimming in the creeks and rivers, I would be digging around some hillside scratching away for rocks and fossils.. I don't even keep them all. Or I'd be overtaken. Well, I give most of them away to kids, hoping it will spark an interest in something more than video games and Facebook. I'm not educated and I don't hunt for so much as I just come across interesting things. But I would like to know of some interesting places to go to find fossils and the like. Or Amber. And I AM curious about their nature and as I said I have no formal education on these things so I thought it might be interesting to find out what some of these things are or if their fossils at all. Thank you.
  7. val horn

    petrified wood chadron nebraska

    i was out hunting white river fossils on a paid ranch near chadron nebraska. found an area with occasional typical mammal and turtle fossils but also large amounts of these layered agatized rocks that I hope are petrified wood. also found were occasional yellow brown translucent "melted wax" pieces that I was told was derived from sap. I thought this is great and brought enough home and now I wonder is it petrified wood or if it purely geological. Please take a look and tell me what you see. there are other areas of badlands within her ranch that have clearly agatized mammal bones, and other areas with purely geological layers of agate and crystal.
  8. In Colorado there is a formation called the Dawson Formation also known as the Dawson Arkose Formation. The most common fossil by far is petrified wood and although I haven’t found any vertebrate fossils from dinosaurs and mammals have been found. It covers a relatively large time span from late Cretaceous to early Eocene, about 70-54 million years old. A member that has also found fossils in this formation, Blake @FossilDudeCO. Although it has been over three years since he was on his posts have still helped. He said that further south is Eocene but higher north in Parker and Aurora is Cretaceous and from the cinnamon tree family. That’s all the basic info, now it’s time for the pictures. The next four are wet to show the color a bit better. The next three are polished via rock tumbler. The next image sparkles like sunlight on snow but you can’t really tell with a picture. While most are brown and black there are hints of color everywhere. Red, and clearly wet. Orange Yellow is mixed in a lot of them with a lot of it being a yellow brown or yellow white color. This is the only rock I have found with green in it. Very strange if anyone knows what any of these minerals are I would love to know. Blueish Purple grey Ill take pictures of more purple ones shortly. Here are just more pictures, Enjoy The largest piece, the first image, is my favorite and largest find being 8.1 pounds (3.7 kilograms). FossilDudeCO said in a topic, "It is thought that the trees fell into standing water and began to deteriorate that is why we don't see lovely rings or any more definition to the wood, rather just strange mashed up chunks and bright colors!" Which I am perfectly fine with. In case you didn't read between the pictures, if anyone knows what any of these minerals are I would love to know.
  9. daves64

    Peace River wood

    I recently purchased a "Pay Dirt" box from forum member MikeG @Bone Daddy's site for a little something to do. In it was this piece of wood. Originally it was a very dark brown, almost black color (imagine that from Peace River). Anyway, I went over the front of it lightly with a 600 grit sanding cloth & the color lightened up nicely. Filed & polished a bit of the upper end & found that it may not be regular wood. Measures 7 cm long by 2.5 cm at it's widest. First 2 pics are the front & back. Pics 3, 4 & 5 are the polished bit at 60x, 75x & 100x respectively. Not used to seeing round in pet wood, so I thought I'd see if this is possibly palmoxylon instead.
  10. Hello. I want to show you some examples from my collection. This is a Carboniferous wood. The preservation is not the best, but for me these samples are interesting for the presence of crystals of smoky and ordinary quartz on them. A sliver that has broken off from a larger fragment. There is more quartz than wood Perhaps a stem or stump - it is almost round in cross section. And thickly overgrown with crystals. Large flattened fragment; perhaps the first sliver was from it.
  11. Hi everyone! Recently I bought this piece of blue petrified wood. In the process of cleaning, I have soak the whole piece in muriatic acid for about a day and half, and in water with baking soda for about 2 days to neutralize the acid. To my surprise the whole skin turn white and the dark blue part has turned much pale in color. I have attached a few photos below for your reference, please noted that when the whole piece is dry the white part is complete white and opaque, but when I added water, the white part became translucent. I am not sure if I have somehow damage it, or if I need to do more to remove this 'white skin'. I would appreciate anyone's advice on what is this white stuff, why adding water would change the opacity and what I should do next. Thank you. These are the photos when I first bought the petrified wood, note only the top part was cut and polished, no treatment done as yet This is after soaking in the muriatic acid for about a day and half, and in water with baking soda for 2 more days, the whole piece turned white, even the polished side change from dark blue to pale white brown color. This is after adding water, you can see the polish part has turn darker brow and the white part became translucent.
  12. Found this item in a creek in the blue ridge mountains. It is very heavy for the size. Any thoughts on if it could be petrified wood or just a schist rock?
  13. DVL

    Possible Petrified Wood?

    I'm told this may be petrified wood but it looks a bit different from the petrified wood I've seen from the southwestern states. Found on a beach in northeast US. Please let me know your thoughts. Thank you --Dwight
  14. Hello. From a recent trip to the Perm-Carboniferous petrified wood, we brought back some very interesting fragments; nothing like this has come across before. Usually we find fragments of wood (chips), without knots, without a pronounced structure - just highly silicified, indeterminate fragments. But while this trip from a small area (just a couple of square meters), we collected several interesting fragments. This is a solid piece of the trunk with knots located at the same level. 7 knots. Another similar fragment, but split lengthwise. There are only 3 knots left, but a cavity with smoky quartz crystals has opened. I want to identify these findings. Having looked at the photographs and drawings, which depict Araucaria, I saw that the branches of this tree are arranged in "layers", i.e. on the same level. Why did I take Araucaria as a basis - in some literature, local layers are called Araucarian. I would be glad to receive any information. By the way, I have a similar trunk with knots on the same level - but it is from the Paleogene; much better preserved, replaced by chalcedony, and has 5 knots.
  15. Good evening. A couple of days ago I managed to go to three places with petrified wood at once. These outlets are not nature reserves; most often, these are fields that are just cultivated, roads and natural outcrops of bedrock (gullies, ravines, etc.). The first place is a small field, as well as a forest protection strip near a spruce planting (it was just plowed up). On a country road, one can see the rock outcrops, in which the wood is hidden. Large cobblestones are also found in the root-bed, but more often these are small slates. Orange clay is a sure sign that the layer we need is emerging here. Nature is waking up. Another forest protection strip... And the first finds. These are fragments of petrified wood from the Carboniferous period; but after meeting with the tractor, these are most often fragments. It has been raining recently, so the wood is easy to find. Nature amazes with its beauty! A few more pieces of wood and it's time to go to second place. Sometimes fragments with smoky quartz crystals come across. Carboniferous outcrops. General view. A sample of wood - most of this place is exactly like that. The second place is another field, and all the roads that lead to it The finds are embedded right into the road. There are also many fragments of wood in the gully - they have even been washed. You don't have to turn off the road... A sample of wood - most of this place is exactly like these. The samples are highly silicified, the structure of the tree is almost not preserved; but light quartz is visible within this specimen. Perhaps grinding and polishing will make the specimens worthy of the collection. Third and last place on that trip. This is no longer a field, although they are here too; these are old quarries. According to rumors, there was once a lot of petrified wood here. On this trip we did not find any fragments - it was starting to rain and we had to leave; besides, from this place we could not take anything - too close to the reserve. Heaps of broken stone are everywhere. The bedrock occurs at an angle to the surface. General view. An old tool. In the pit, where the stone was once mined, now a tree grows. A couple of photos before leaving. We did not find a petrified tree in this place, but we picked up such a fragment in a nearby field. A lot of iron, a lot of quartz. That's all for today. Thanks for attention. Have a good evening.
  16. I thought I would share this unique piece of petrified wood I own. I don’t know if this is rare, but I couldn’t seem to find anything on this. To the naked eye, the rings of the wood are tiny white rocks. But under the microscope, you can clearly identify agates. Fraxinus Nigra is the name of the species. The microscopic pictures are too large for the post, but I think you can download them to view.
  17. BAAMM

    Found in Wisconsin

    Found my first piece of fossilized wood looking to learn a little bit more about it anybody have any information.
  18. Crgold36

    What Do Past Tsunami's Leave Behind

    I can't find much history or geological information of the Seattle area in Washington State before the people started settling there. I get lots of history about how everyone settled, who they were, dates of events, and the beginning of industries. Is there a easier way to find out through other resources about actual formations of the land and geological events that have happened in the past throughout the centuries? Is that made available to the public for research in their findings of fossils? There's more then I thought to learn about when it comes to fossils, and when it comes to fossils being found in or out of profound areas where you don't know how it may have got there, takes you more on a history hunt for answers to the how? question, and the when? question. Finding a fossil in someplace that makes you scratch your head???.. I'm sure this has happened many times. Hasnt it?.. Ocean animal fossils no where near the ocean? I believe that would be evidence of a past tsunami. Could there be any reason why sea fossils would be found in the middle of a populated city not really that close to a Ocean but close to a man made lake. Half salt water half fresh water. I think there should be a key importance to explore more of city populated areas before major construction. Seattle is a place that has never been explored geologically so much other then the beach along the coastlines. I find no evidence of geological history of Washington but of our volcanoes, not so much tsunamis at all. Seattle has just been built on top of so quickly, that Seattle hides a whole lot more beneath the high rolling hills and valleys surrounding then we think. There are less and less places to explore in a growing city and I'm not a expert, but when I can notice something out of the ordinary and you know it's of importance, how can it not excite you enough to find out more about it! So who's the first one I would call to report a geological formation of importance? How are those steps determined in the concept of discoveries ownership and so on? The laws are so twisted and much goes into it. The reward it's self in fossil hunting or just stumbling upon one is the past answers they give us, but they are our future answers too!
  19. Rubykicks

    Petrified wood identification

    I believe this is petrified wood. I Found this and a larger piece, but the larger one is a different texture. It's more smooth with dimples and I was able to figure out identification of that one, but I'm not so sure about this one. Any information?
  20. hndmarshall

    Just Weird...What is this???

    Ok found this Odd thing at first thought it might be petrified wood but I tried looking at it through a microscopic camera and could not find any of the basic fossil wood cell structure that I normally find on petrified wood. There are places on it that look mesh like? ....well I took a close up of it ... if it were some type of bone the inside would be darker right?....just not sure with this one. Found in a gravel load from the bed of the Brazos River near the West Houston Texas area.
  21. AggieGrass

    Landscape River Rock Finds

    Howdy, Couple day old member here. I am a Landscape Professional and I see alot of river rock. Lately I've moved to Austin, TX and have noticed alot of petrified wood in the rock materials we use. I'm 99% positive it is all native, locally sourced in the Texas Hill Country. Anyway I have a few pieces I'm curious to whether it's machine marks or not and a couple pieces I'm not sure if they're just gnarly rocks or not. Petrified wood ID is what brought me here and I found some good info so I signed up. Any information and help is greatly appreciated. Thanks yall!
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