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  1. TheRocksWillShoutHisGlory

    Arizona rock identification.

    These were both collected in Arizona, I am wondering if the top one could be rough amethyst.
  2. Arizona Rockhound

    Agatized Coral?

  3. Othniel C. Marsh

    Phytosaur tooth

    Below is an unidentified phytosaur tooth from the Norian of the Chinle Formation which I've been struggling to identify to a genus or species level. Thanks in advance for any proposed ID's Othniel
  4. Approx. 90mm dia x 15mm thick Long time lurker. First time poster. Thanks for having me! Hoping for info on this specimen. I have spent about 10 hours over the last 6 months trying to positively ID and I am stumped. I found this specimen and accompanying materials after a one hour 4Lo rock crawl followed by a grueling two hour uphill hike near Horseshoe Lake, Maricopa County, Arizona. Thank goodness for traction boards or I would have been walking back to the main road! I was out for chert, chalcedony, and other fossil material when I came across this laying right on the surface. Stupidly, I should have grabbed a picture right then. In my excitement, I failed to. From the description of the surrounding area (copied below) I believe it to be some form of a Stromatolite. However, the other photos I found online don’t seem to match up very well. For one, this thing is pure black something. I cannot find an example of one this color. Also, this specimen has a “slice” that runs from approx. its center to almost its outer edge and is through the piece (visible in photo). Which makes it look much more organic in form than other Stromatolites I see. Other ones appear very “geologic” looking to me. My rockhound partners who are not deeply knowledgeable in fossils have said it reminds them of a mushroom or some type of sea anemone. That’s the type of organic matter form that it resembles anyway. As a long time hound myself, I am struggling to determine the composition. It’s not like coal and doesn’t resemble any material I have previously seen or collected. It’s really best described as “graphite like”. The smaller pieces pictured have also given me few clues. They leave a brownish black streak on white paper. I cracked a small piece of the end of one and in the sun the material really sparkles like glitter and is a bit sandpaper-ish. On the outer surface the material is smooth feeling otherwise. Other guesses are some type of larger Tufa or a Coprolite of some sort (but what sort). I am definitely all ears and thank you in advance for taking your time to look. Info on the surrounding areas and why I believe it may be some type of Stromatolite: "That's not snow! This is Chalk Mountain adjacent to the Horseshoe Reservoir on the Verde River. According to Wrucke and Conway (1987, USGS OFR- ), Chalk Mountain consists of white to light-gray, finely laminated limestone. Chert also occurs but is minor. Small centimeter-scale stromatolite-like mounds suggest an origin as algal mats growing on a paleo-lake bed. The authors suggest the deposit may be correlative with the Plio-Miocene Verde Formation." For the report and map: LINK
  5. Here is a three day meeting of the Western Association of Vertebrate Paleontologists with talks and trips near Prescott, Arizona. Students can present posters or give talks. Registration is $50. From Jeb Bevers: “Dear Paleontologists and Friends, Please see the attached file on abstract submissions. We have extended the deadline to February 1st for these. A number of you have already submitted your abstract and we greatly appreciate all your efforts towards this. Again, if you are going to register, the earlier you do so, the better for working out our numbers for food (dinner, brunch, lunch, dinner, and a few snacks) and for the t shirt order. If you are unable to register, just yet, but intend to, please send me an email to indicate your likely attendance and t shirt size. I will need to order the t shirts no later than January 30th. I look forward to seeing you at the meetings and showing a bit of our local Neogene paleo site to those attending the Sunday field trip. Please note that the dates for the Western Association of Vertebrate Paleontologists meetings is February 16th-18th, which is the same as prior announcements. The link to register for this event is provided below. Please feel free to forward this to interested persons. Also note two attachments in this email. One is for abstract information and the second is for food preferences for the meals and t shirt sizes at the event. For the Sunday field trip please provide your own snacks and lunch, though we should have a few available if not everything was consumed on Saturday. Also bring a reusable water bottle or drink in a container. I will have some sparkling water for this as well. The link to the registration site is at: https://www.eventbrite.com/e/western-association-of-vertebrate-paleontologists-2024-tickets-777473753927?aff=oddtdtcreat Best regards, Jeb Bevers Biology Dept. Yavapai College 1100 E. Sheldon St. Prescott, AZ 86301” (I tried to paste addresses of the links mentioned above. If they don’t work contact Jeb Bevers above.) https://mail.google.com/mail/u/0/s/?view=att&th=18d3ffe66a133953&attid=0.1&disp=attd&safe=1&zw
  6. The Flagg Gem and Mineral Show in Mesa, Arizona has several displays and dealers of fossils. Lots of free or very inexpensive activities for kids. https://flaggmineralfoundation.org/home/flagg-gem-and-mineral-show/ I’ll be there with the Arizona Museum of Natural History and the Southwest Paleontological Society to show and talk about fossils and paleontology. Copies of the SW Paleontological Society Bulletins will be on sale for a significant discount from the normal prices. Get a set for free if you represent a library or nonprofit geology/paleontology related research or teaching group such as a school. https://www.arizonamuseumofnaturalhistory.org/for-educators/paleontology/publications Bring in your fossils to show us and ID. Also a great venue to bring in your rocks and minerals too. Two of the Museum paleontologist will be there early afternoon Friday. Bring your fossils.
  7. Fossildude19

    Arizona Permian Footprints

    From the album: Fossildude's Purchased/Gift Fossils

    An extremely generous Christmas gift from Jeffrey P. Thank you, Jeff! @Jeffrey P

    © 2024 Tim Jones

  8. Hi everyone! I recently uploaded a pair of expedition videos to YouTube from my September trip to some late Triassic beds in northern Arizona. If you're an old school Walking With Dinosaurs fan, you may be interested to know that this spot is quite close geographically to the famed Placerias Quarry whose fossils were hugely influential in the making of Episode 1, "New Blood". I, and I suspect many of you as well, found WWD and its spinoffs to be easily the most captivating natural history documentaries of their time, and I credit its opening act taking place in my home state as playing an influential role in why I ended up in this field of study. I spend more of my time these days working in Cretaceous rocks than anything else, so coming back to the Triassic is something of a homecoming for me. Fossils at this locality are abundant but frequently in rough shape, since they begin to erode and fragment while still several inches below the surface. Teeth, like the phytosaur crown above, hold up better and are usually among the best finds of each trip. I also collected some fragments of metoposaur skull or clavicle (watch the second video in particular if you're interested in these guys!) but I will hold off until I've finished gluing the pieces together before sharing here. 😉 While large stretches of Chinle beds in northern Arizona are now federally protected under Petrified Forest National Park, these protected areas do not extend over the entirety of Arizona's late Triassic province. A short walk away from where I collected fossils is this massive excavated pit that has cut down through the fossil-bearing layers. This burial site of over 200 million years will soon become a landfill for human waste. I think this is an important reminder of why we collect fossils in the first place: 'everything not saved will be lost'.
  9. RetiredLawyer

    New Tracks and Paper Publication

    I found a new track area. Not great tracks but definitely tridactyl tracks! Chirothere and rotodactylus also so far. This must be Chinle Formation. The article on my trackway is due in January.
  10. Hello everyone, this specimen has been advertised as a phytosaur scute from the Triassic of Northeastern Arizona. I'm curious if this piece is genuine and unmodified as it is relatively cheap. I'm also wondering if it isn't metoposaur scute as I've not seen a phytosaur scute like this. As always, any help is appreciate, thank you.
  11. maddux54

    Help Identifying Dinosaur Bone

    I need help identifying this fossilized bone please. I found it approximately 15 years ago in the area of Witch Wells, Arizona. Thanks in advance.
  12. Was recently digging for petrified wood just outside of Petrified Forest National Park (near Holbrook, Arizona). While most of the pieces I found were clearly petrified wood, river rocks, or composite material, this one piece has confounded me. I know there are plenty of other fossils in the area- I would love any help in identifying what this could be! In the images, I've added a credit card sized object for reference. Thanks so much.
  13. RetiredLawyer

    Very interesting tracks

    Been ill so wandering around my tracks and saw this today. I have pestered Spencer with a million “no those are chirothere undertracks” but this I really wonder about. Remember it’s Middle Triassic so three toed tracks are rare or nonexistent depending on who you ask. Let me know what you think. The track above the rule is rotodactylus
  14. DPS Ammonite

    Prep Conulariid

    How should I prep this 6 cm wide crushed conulariid that is covered in a massive bryozoan and is from the Pennsylvanian Naco Formation of Arizona? It is only the second one that I have found. The matrix is a shaley limestone and is full of bedding cracks. Flakes are falling off either side of the fossil. I would like to take most of the matrix off the back side by hammer and chisel along a bedding plane 1-2 inches below. I can make any thickness of Butvar B-76 solution in acetone. I am afraid that covering the conulariid with Butvar might not hold it together if I try to split the rock and inch or so below the fossil.
  15. RetiredLawyer

    Another trackway update

    I’ve made a lot of progress. I have one large main section and a smaller section that I still haven’t gotten connected up. The red circles are the manus (front) tracks that Dr Klein wanted me to be sure I got. I’m still digging out more tracks but the rocks have gotten smaller and more irregular. The individual pictures are what I’ve found in the last couple days. Dr Lucas is coming in September to take what he needs for his research
  16. DPS Ammonite

    Naco Formation gastropod

    What is this cross section of a 5 cm tall gastropod from the Pennsylvanian Naco Formation of Arizona? The photo of whole gastropods that are similar and are found in the same formation at the Kohl’s Ranch site. Photo by Caty Sandoval. What are these? This may help (I have a good guess): https://www.dallaspaleo.org/resources/Documents/PGUPFT 2a Mollusca first half.pdf
  17. DPS Ammonite

    Conulariid?

    This fossil with faint triangular outline is covered in a bryozoan was found in the Pennsylvanian Naco Fm. near Kohl’s Ranch. Is it a flattened conulariid? 2 cm coin for scale.
  18. Reddslife90

    Fossilized human finger

    Here's a finger that was gifted to me from my father it was passed down from generation to generation starting with my 4th great grand father was said to be found in the state of Arizona somewhere in the mountains...please give me an honest opinion on what you think it's worth if anything and how old it should be because I don't know seeings how all my relatives that knew anything about great details are long deceased
  19. I am going to Scotsdale in a couple weeks any suggestions where to hunt?
  20. Kudos to the Museum of Northern Arizona in Flagstaff for having a photo database of fossils many of which are type specimens. I recognize some of the invertebrate fossils in the first 4 pages including those from the Kaibab, Redwall and Naco Formations. Color photos are a good compliment to those black and white and sometimes poorly reproduced photos in the type references. http://argus.musnaz.org/ArgusNET/Portal/Default.aspx?lang=en-US&p_AAEE=tab4&p_AAFV=Paleontology&d=d I wish more institutions would put their fossils, especially the type specimens, on the internet to use for free. See color pictures of Pennsylvanian Naco sponges from the Museum of Northern Arizona next to the black and white photos from the internet. Dilliard, Kelly & Rigby, J.K.. (2001). The new demosponges, Chaunactis olsoni and Haplistion nacoense, and associated sponges from the Pennsylvanian Naco Formation, Central Arizona. Brigham Young University Geology Studies. 46. 1-11. https://geology.byu.edu/0000017d-0fdd-d6bc-a9fd-fffdc35d0001/geo-stud-vol-46-dilliard-rigby-pdf Chaunactis olsoni: Haplistion nacoensis:
  21. This was found in dry wash, in Cocconino county Arizona. I was walking up dry wash looking for petrified wood. I thought this was just a nice black piece of petrified wood. It was in loose sand in the middle of a deep wash. They were 10-20 foot walls with a 20 foot wash base. When I got back to truck, I notice it was a lot smoother then the other pieces of petrified wood that I saw that day. The tooth had longitudinal grooves and lines that looks like worm trails. The yellow marks wouldn't wash out of the worm grooves. It also looks like three teeth connected together with fault cracks running thought it. I did try to get help identifying this tooth from Arizona museum of Natural History, who told me to next contact Arizona State University. I haven't goten any response. I have pictures of petrified wood found near this tooth. I can attach them later if that will help. If there is any other information needed let me know. Rocky Jeep
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