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  1. 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.
  2. Good afternoon everyone, I’m reaching out today in hopes of getting some information on two specimens. I have no location based information , unfortunately. The first reminds me of petrified wood and stromatolite, it’s a huge faced specimen. The color is darkish red, almost a limonite yellow and some mixes of other feint colors. It looks partially agatized as well. It’s a super cool piece. The second specimen is aquatic based I’m sure, it looked sort of like coral at first glance. After further inspection I’m unsure, so I figured I’d reach out. The specimen is large, 9x5x4 and weighs in over 5 pounds. It looks as if some of it might be a conglomerate, I’m unsure. It looks partially calcified and agatized as well. I appreciate your time and consideration in advance as always. Enjoy the day, Regards, Mike
  3. fossils4fun

    White but not limestone?

    Went out metal detecting yesterday and found this in northwest Arkansas. It's exactly 2 1/2" long. It looked like a black rock so I thought it was an unusual shape so I brought it home washed it and it was white. The shape is unusual and the rings on the end are like wood. There's a tiny hole the black is dirt in the hole. It sparkles in the sun a tiny bit but it's not crystal and it doesn't look like the limestone I usually find. Help me out please, thanks.
  4. Not knowing petrified Wood species well, I searched the web and specifically TFF and came upon Marco Sr.'s fabulous thread and collection of pet.wood. I only have a few pieces and all are close enough in appearance to be the same species, if I'm guessing correctly. And that would be Pullisilvaxylon arizonicum. Anyone have a confirmation or another correct species? Thanks, Steve I cut 3 or 4 slabs off and gave the large piece to my son. He moved into a house his uncle bought for the college kiddos to be closer the University and left it behind so I snagged it for the pics and ID.
  5. Below are some of the slabs/slices/limb casts of petrified wood from my collection. I'll post more pieces in latter replies. I especially like very colorful pieces and unusual pieces like Teredo bored pieces or pieces with fungus. I have hundreds of close-up pictures. If you would like to see close-up pictures of a particular piece, reply to this post with the number/numbers. If you want to see close-up pictures of some of the petrified wood pieces from this thread, check out my TFF thread at the below link: 1 Petrified Wood botryoidal agate golden calcite insect borings ostracods Eocene 50 MYA Green River Fm Blue Forest along Lake Gosiute Sweetwater County Wyoming 1.2 lbs 8.25 x6x.38 inches 2 Petrified Wood conifer Araucarioxylon arizonicum fungus Polyporites wardii early Permian late Triassic 295 to 201 MYA Chinle Fm northern Arizona 3.60 lbs 10.25x8.75x.5 inches 3 Petrified Wood Triassic 225 MYA Chinle Formation near Holbrook Arizona 745g 160 x200x12mm 4 Petrified Wood Seed Fern Rhexoxylon Triassic 220 MYA Ambilobe Madagascar 136g 3.75x2.50x.375 to .5 inches 5 Petrified Wood Araucaria conifer Monkey Puzzle Tree Triassic Age 200 to 250 MYA Acondromen Madagascar 575g 145mmx95mmx18mm 6 Petrified Wood Araucaria conifer Monkey Puzzle Tree Triassic Age 200 to 250 MYA Acondromen Madagascar 182g 4.25x3.5x.31 inches 7 Petrified Wood Araucaria conifer Monkey Puzzle Tree Triassic Age 200 to 250 MYA Acondromen Madagascar 201g 4.25x3.5x.375 inches 8 Petrified Wood Araucaria conifer Monkey Puzzle Tree Triassic Age 200 to 250 MYA Acondromen Madagascar155g 4.25x3x.375 inches 9 Petrified Wood Araucaria conifer Monkey Puzzle Tree Triassic Age 200 to 250 MYA Acondromen Madagascar157g 4.25x3.25x.375 inches 10 Teredo Bored Petrified Wood Slab Paleocene Epoch Canon Ball Formation North Dakota 2,150g 10.25x9x.625 inches 11 Petrified tree fern Tietea singularis Permian 275MYA Motuca Formation Parnaíba Basin in Filadélfia Tocantins Brazil 340 g 8 x 4.75 x.25 inches 12 Petrified Wood encased In Algae-Laurel Eocene Bridger Formation Blue Forest WY 1802g 9.5x7.75x.625 to .75 inches 13 Petrified Replacement Wood Eocene 34 to 40 MYA Clarno Formation Hampton Butte central Oregon 484g 7 x 5 x .44 inches 14 Petrified Wood Slab Woodworthia Triassic Chinle Formation Winslow AZ 408 g 5.5x4.25x.43 to.5 inches 15 Agate Petrified Wood Turkey 253g 6.25 X 3.25 X .31 inches 16 Petrified Wood Slab Cedar Miocene 15.5 MYA Wanapum Basalt Formation Saddle Mountain Washington 228g 5.5x4.25x.25 inches 17 Petrified Wood Slab Miocene 15.5 MYA Wanapum Basalt Formation Saddle Mountain Washington 361g 5.75x5x.44 inches 18 Petrified Shrinkwood Miocene Fleming Formation Live Oak County, Texas 176g 4.25x3.5x.375 inches 19 Yew Taxus sp. in Stromatolitic Algae Miocene Tonopah Nevada 3.25 x 2.5x.19 inches 20 Teredo Bored Petrified Driftwood Middle Miocene Saltos Shale Member Monterey Formation Santa Barbara Canyon near Cuyama CA 6 x 4x.625 inches 21 Petrified Wood Araucaria conifer Monkey Puzzle Tree Triassic Age 200 to 250 MYA Madagascar 572g 5.75x4x.7 inches 22 Hematite Replaced Teredo Bored Petrified Wood Eocene Yegua Formation or Cretaceous 40 to 50 MYA Lake Bryan TX 288g 7.25 x3x.44 inches 23 Petrified Wood Log Miocene Jarbridge Ryolite Formation Hubbard Basin Elko County Nevada 1061g 4.25x4x1.75 to 2.75 inches 24 Petrified Wood Triassic 225 MYA Chinle Formation Arizona 1186g 8.25x6.75x.625 inches 25 Petrified Wood Sycamore Platanus sp. Miocene Bopesta Formation Horse Canyon near Tehachapi Kern County California 271g 4x3.5x.75 inches Marco Sr.
  6. Specimen A: BACKSIDE OF SPECIMEN A CROSS SECTION OF SPECIMEN A SPECIMEN B: BACKSIDE OF SPECIMEN B:
  7. My family and I went on a trip to Yellowstone, the Green River Formation and the Blue Forest in Wyoming. Although my son found by far the best Blue Forest specimen, I thought smaller specimens were also of interest. The attached image illustrates a common theme of the petrified wood specimens. Typically, the outer bark results in a fluffy white deposit of calcium carbonate. The inner bark is often composed of what the locals refer to as "blue opal" (likely chalcedony), and then the center part appears to be silicified wood. Some specimens had iron oxides as well. I highly recommend a trip to the Blue Forest. It is very out of the way and directions are hard to find. The directions we found at one point stated that we should turn left at the gravel road with a rusty barrel at the intersection. We traveled down the gravel road for many miles until we spotted dig sites. It is very remote and you would want to make sure you vehicle is in good condition with plenty of gas and that you have plenty of water.
  8. Shaun-DFW Fossils

    Tarrant formation petrified branch

    I found this interesting piece of pet wood some time ago in the Tarrant formation, it had eroded into a creek. Notice the ship worm holes. I was surprised it had a small part of the secondary branch still connected. Tarrant county, TX
  9. Tom D

    West Viginia petrified wood

    I was visiting a friend in West Virginia who is preparing his property for building his home. It's just south of Charleston. I noticed what I think is a layer of petrified wood. Not sure though. Any information would help. There were also petrified nuts.
  10. theArborist

    Arborist from Delaware

    Hello from Bear DE USA
  11. New here, love fossils. My collection in attached images. Coral and others I can not identify. Beautiful pieces.
  12. L.S., Wanted to share this "mini ecosystem" in fossilized form. The photos below show a rhizome of Osmunda pluma Miller 1967, a member of the royal fern family, from the Paleogene of the Fort Union Group (probably the Sentinel Butte Fm.) near Glenn Ullin in Morton County, North Dakota. On the first photo you can see a central stele surrounded by "eyes", which are cross-sections through the petioles of the leaves of the fern (see for comparison this section made through an extant Osmunda cinnamomea rhizome). More to the top and bottom of the photo, parallel lines are visible. These are the remnants of a woody texture, probably of some kind of gymnosperm (see also the second image, a flatbed scan of the entire slab containing the fern rhizome). According to Miller (1967, p. 143) the fern was growing on a so-called "nurse log": when a tree in the woods falls over and starts to decay, this can provide an excellent opportunity for new plants to grow! See for example these lovely examples of modern nurse logs. Cheers, Tim Fern rhizome of Osmunda pluma Miller 1967 showing central stele and petioles The fern rhizome is embedded in a woody texture, interpreted as a nurse log.
  13. theArborist

    Petrified Wood slab

    I have a 4" x 6" x 0.6" slab, collected in Arizona or New Mexico by my grandfather in the 1960s. It was cut and polished, now a pen holder. I can clearly see the cellular structure. Is it possible to determine the type of plant/tree this was? I can do this for living trees, but I'm lost with trees from millions of years ago. Also, there are some microscopic features that appear to be roots that were growing through the wood before silicification. Any thoughts or comments on these? See bottom left of 4th photo. Finally, are there are resources I can use to answer these questions? Researchers, experts, etc whom I might contact? Thanks for your help.
  14. It can be very difficult to tell from pictures, a lot of the time, fossils that are misidentified, completely fake, composites, restored etc. This one is very easy to tell. I'm always looking for petrified wood on-line from a couple of the large auction sites and came across this piece. It made me laugh when I saw it, so I thought I would post it for other TFF members to enjoy. If you can't see immediately the multiple problems with the piece description, based upon the below pictures (there were many more pictures in the post), do not buy fossils on-line. At least the seller posted a good number of decent pictures from all angles, not the couple of blurry, grainy pictures that you normally would see for items like this. EDIT: Do not try a burn test on this piece to determine if it is a fossil or modern, unless you are burning it to heat your house. Item description: Petrified Wood Piece With A Real Marijuana Leaf Fossilized Marco Sr.
  15. Breezy2428

    Snake Wood or Palm Wood?

    Hello. Thoughts if this is palm wood or snake wood? Is it agatized or opalized? Found in Karnes County, Texas Thanks for any input!
  16. Nothosaurus

    Petrified wood, Is it?

    I would appreciate any assistance on identifying this fossil . I found it in an antique store. Dimensions 4”x 4” x 1” it looks like it might be petrified wood, but what throws me is the top is all black crystals. Each one sparkles. The other side has a little lumps on it, which looks to be like mini stalactites. Not sure what that is from. There are layers as you can see to this piece. Any help from you dear friends would be greatly appreciated.
  17. Tailes

    Petrified charcoal or stone?

    Hello everyone, I found an odd rock at my beach in Florida. It looks like charcoal. It’s heavy like cement. Sand has formed rock around the bottom. (Coquina?) It also has rust colors around the sandy parts. It probably has been in the ocean a long time. From looking online, it might be Lignite. Just curious how old it might be and what it is. Thanks everyone!
  18. Looking for thoughts of what this might be. It was found in Bastrop County, Texas and was found in a formation I can only date to the Eocene. It was surface collected after eroding from a layer of ironstone, the specimen being much denser than ironstone. Although likely not the case, the wavy straw-like structures (that are approximately 1mm in diameter) remind me of the coralloid roots found on a cycad or the vascular structure of a palm. There do appear to be rings or layers visible in the cross section. The scale shown in the photograph is in inches. I appreciate any and all attempts to identify. GB
  19. Superlady

    Identification

    I received this piece of petrified wood and am curious about any history I can find. This was found in the Dallas Texas area in 2023
  20. I mapped out a quick trip to recover some pet wood I identified last week but failed to initially remove due to having too many ammonites (I know, a real problem!), taking me initially by a Fort Worth formation spot. I found a few huge macraster echinoids (currently being cleaned a little) in tarrant county, a few smaller mortoniceras ammonites, and a nice bivalve. Then I swung by the eagle ford shale where it starts after the woodbine and found 2 conlinoceras and some nice pet wood in addition to my target specimens from last week. Also a bone, currently awaiting ID. Tarrant to dallas counties, TX
  21. Julia buck

    Un identified specimen

    I have been stumped by a "rock" I found in my garden over 25 years ago. I have had a continuous need to know what it is purely for my own curiosity. It has "something" inside of it and during the years I've had suggestions of lizard eggs, man made object, etc. Ive obviously spent endless hours looking at it, and I think I've seen some kind of feathers entwined around the small round egg like masses encapsulated within the dark almost black in some light yet like sunrise in another. Its too large to float test fairly heavy makes me doubt amber but given the detail inside hard to think of alternatives.
  22. bockryan

    Petrified Wood

    From the album: Fossil Collection: DC Area and Beyond

    Petrified Wood Unknown Unknown Unknown
  23. Hi, I have several recent finds, all on one property, here in N. W. CT. These finds are new to the area, and I first want to show photos of petrified wood, I have found here, in several different varieties,including different types of rocks making them up.
  24. Steve DeGoes

    New guy with lots of questions!

    Hello everyone! I'm in the Big River, San Bernardino county along the Colorado River area around the Whipple mountain range the pictures I will be sending is to get input from from you that know and to find out how far off I am on my thinking as to what they are! One thing for sure is there is alot of awesome stuff here! Thank you in advance!
  25. bockryan

    Petrified Wood

    From the album: Fossil Collection: DC Area and Beyond

    Petrified Wood Unknown location, AZ Unknown Late Triassic
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