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Found 147 results

  1. Arizona sponge

    I found part of a sponge from the Pennsylvanian Naco Formation. The sponge is 5 cm in maximum width. The needle like structures average about 0.2 mm in diameter. Are the needle like structures part of a sponge body or part of the roots? Species? A cross section shows the needles radiate from the center. Photos: 1 top 2 bottom 3 cross section 4 detail
  2. I bought this silver bracelet and I would really appreciate an opinion as to whether the stone could be Arizona petrified wood. I assumed it was maybe picture agate, but a couple people thought maybe it was petrified wood. The bracelet is unsigned and is very heavy gauge silver.Thanks for your help.
  3. I will be visiting Phoenix in May and am looking for someone to go digging with. I have done the site NW of Payson (corals, bryozoan)
  4. Turning Lemons into Limes

    Here are some more Miocene plant fossils from lake sediments north of Phoenix, Arizona. The first large piece of brownish chert, a lemon, had poorly preserved stems. Because the lake sediments had abundant uranium, the rock glowed bright lime green under short wave UV light. Organic matter often attracts uranium deposition.The second piece in the third photo has a great impression of plants that looks like it could have been created in fresh concrete yesterday. Field of view in all photos 6-9cm long.
  5. Arizona Miocene Plants 2nd Trip

    Here are some more lake wetland Miocene plant fossils from NE of Phoenix. I found large outcrops of silicified reeds in growth position. I found several pieces of palm: a first for this area. Photos 1 & 2: palm. Photos 3 & 4: top and bottom of reeds. Photos 5 & 6: more reeds.
  6. Fort Crittendon Vert

    This is a partial vert from the Fort Crittendon Formation, Old Santa Rita Mountains, Arizona. Anything diagnostic enough to tell what species or family this belongs to?
  7. A new paper on early lissamphibians is available online: Michelle R. Stocker; Sterling J. Nesbitt; Ben T. Kligman ; Daniel J. Paluh; Adam D. Marsh; David C. Blackburn ; William G. Parker (2019). The earliest equatorial record of frogs from the Late Triassic of Arizona. Biology Letters. 15 (2): Article ID 20180922. doi:10.1098/rsbl.2018.0922. The frog material described by Stocker et al. is significant because it is the first record of Salientia from the Late Triassic, constituting the second described record of Late Triassic Lissamphibia after the primitive caecilian Chinlestegophis. The discovery of Late Triassic frog remains helps fill a gap in the fossil record of early frogs, because Prosailurus is the next oldest fossil frog known from diagnostic remains. Now the next step is to find a Triassic caudatan (salamander) specimen, because the earliest salamanders have been found in the Middle Jurassic.
  8. Miocene Plants in Lacustrine Formation

    I found these in a Miocene lake bed formation northeast of Phoenix, Arizona. The lake beds are deposited along with volcanic rocks and are probably part of the Chalk Canyon Formation. The lake beds have pieces of agatized plant material. Any ideas of what the plants might be? I am especially interested in the molds of a jointed plant shown in the first three photos. @paleoflor Photo about 6cm high. Detail of first photo. Filled center of plant stem ~0.7mm. Depressed mold of stem ~ 3mm across. Height of photo ~2.5cm. Detail of first photo. Center of stem ~ 1mm. Mold of stem ~3mm across. Length of stem ~5.5cm. Bunch of stems average of 5mm across. Cross section of above photo. Typical stems each about 2 - 4mm across. Possible stromatolite/algae structure.
  9. I will actually be moving out west in June/July, I’m currently researching the areas. I’m calling on the experts to let me know which is the best move for fossils. I’m a geology grad with a desire to pursue paleontology, so career opportunities must be kept in mind as well. The three cities we’ve narrowed down are Fort Collins CO, Flagstaff AZ, and Bend OR. Don’t worry, I will be bringing a plethora of Florida fossils with me, so, whoever gets to meet me will have plenty of gifts and goodies. Just looking for some solid advice. ps, sorry for being so absent on the forums lately; life has been a little cray!
  10. Hi friends, I am hoping to have an opportunity to go Arizona and get away from this cold winter weather here in Canada. If I can pull this off, I will be staying near Chandlier Arizona. Does anyone know of any sites I might be able to go wander in? Where are the fossil site in Arizona? I need to get myself there!!
  11. Here is The Association of Applied Paleontological Sciences online guide for fossil dealers and other paleo related info for the 2019 Tucson (Arizona) fossil, gem and mineral shows. The guide lists dealers by speciality and venue. The guide has some blank pages (advertisements missing?). https://aaps.net/pdf/2019-AAPS-Guide-final-lo-res.pdf
  12. Here is a fantastic example of a calcareous rock (possible Mancos Shale) from NE Arizona (Black Mesa) that I obtained from the teaching collection of a retired geology professor. The whole rock is about 6 inches long. Can anyone guess what it is and why I like it? Can you make a good guess @FranzBernhard?
  13. Grand Canyon Paleontology

    Hey y'all, hope you're all having a good time! This recently published report by Hodnett & Elliott (2018) describes two fairly diverse chondrichthyan faunas from the late Mississippian/early Pennsylvanian of western Grand Canyon (Arizona). The assemblages, from 2 separate formations, are described on the basis of quite many tooth specimens, and other material (i.e. denticles). Differences between those faunas and other similar-aged Euro-American faunas indicate paleogeographical implications relating to the formation of Pangaea. Hodnett, J. P. M., & Elliott, D. K. (2018). Carboniferous chondrichthyan assemblages from the Surprise Canyon and Watahomigi formations (latest Mississippian–Early Pennsylvanian) of the western Grand Canyon, Northern Arizona. Journal of Paleontology, 92(S77), 1-33. Abstract: Two chondrichthyan assemblages of Late Mississippian/Early Pennsylvanian age are now recognized from the western Grand Canyon of northern Arizona. The latest Serpukhovian Surprise Canyon Formation has yielded thirty one taxa from teeth and dermal elements, which include members of the Phoebodontiformes, Symmoriiformes, Bransonelliformes, Ctenacanthiformes, Protacrodontoidea, Hybodontiformes, Neoselachii (Anachronistidae), Paraselachii (Gregoriidae, Deeberiidae, Orodontiformes, and Eugeneodontiformes), Petalodontiformes, and Holocephali. The euselachian grade taxa are remarkably diverse with four new taxa recognized here; the Protacrodontidae: Microklomax carrieae new genus new species and Novaculodus billingsleyi new genus new species, and the Anchronistidae: Cooleyella platera new species and Amaradontus santucii new genus new species. The Surprise Canyon assemblage also has the youngest occurrence of the elasmobranch Clairina, previously only known from the Upper Devonian. The Surprise Canyon Formation represents a nearshore fluvial infilling of karstic channels, followed by a shallow marine bioherm reef, and finally deeper open water deposition. The early Bashkirian Watahomigi Formation represents open marine deposition and contains only two taxa: a new xenacanthiform, Hokomata parva new genus new species, and the holocephalan Deltodus. The relationship between the Surprise Canyon and Watahomigi chondrichthyan assemblages and other significant coeval chondrichthyan assemblages suggests that there may have been eastern and western distinctions among the Euamerican assemblages during the Serpukhovian due to geographic separation by the formation of Pangea. Here's the paper Hodnett & Elliott 2018 Grand Canyon chondr. fauna.pdf Happy New Year to you all!! -Christian
  14. Ape man

    I hope these are better pics.i have the chest cavity with ribs and spine also
  15. Ape man

    Please help you can see teeth and one eye. Something crushed its head on right side. Also the spine on the back side. I have chest cavity and lung. Please help if you would thank you.
  16. Identification

    Hello, I joined this group today so that I might have a recent find identified. My name is Larry Atkins and I'm a meteorite hunter from Michigan and I spend a lot of time in Arizona looking for space rocks. I find a lot of different things out there and yesterday I found an interesting cluster of fossil bone and teeth. Last spring, in the same wash, I found a partial skeleton of a huge tortoise. The Arizona Museum of Natural History was supposed to dig it up but they never got around to it and the monsoons have apparently washed it away! So disappointing. Here's an in-situ of yesterday's find. This is in Pinal county AZ. Thanks! Larry
  17. Who's Permian feet made these?

    If anyone is familiar with Permian tracks, can anyone ID these? All I can tell is that they appear to be synapsid tracks, but not Dimetrodon. I'm assuming that means Edaphosaurus is out too, but that's all I can figure. the ONLY details still known are that they're Permian tracks from somewhere in Arizona. There's no more information available. There's 4 plates... 1-pic 1 2-pics 2,3,4 3-pics 5 4-pics 6,7
  18. FOSSIL or ARTIFACT?

    I found this in a fossil bed along with some clam fossils I was finding near Globe, Arizona. It was sitting in a depression on the ground near an exposed limestone fossil rift. The white band goes all the way around symmetrically and the rock type does not match anything in the area. is it a fossilized turtle shell, or nut maybe? or an indian artifact, or just an out of place rock?
  19. Vertebra identification request

    Found what may be a vertebra, sticking partially out of the ground on private property near Phoenix, Arizona in Maricopa County. The soil is hard-packed coarse sand/silt/gravel with areas of clay. A landscaper added a top dressing of decomposed granite and river rocks - a typical desert landscape design around here. The specimen likely was transported to the site in the river rock. Luck me! Other fossils found in the landscape material lead me to believe it came from a healthy and diverse marine environment with turtles, fish, shark, crocodilia, lizards, skate, snakes and mammals. The entire area was once an inland sea. The specimen is approximately 6.5 cm length x 5 cm width x 2 cm height. (Lateral measurement varies from 1.5 cm to 2.5 cm.) The vertebral body is 5 cm length x 4 cm height. Let me know what you think. The "tooth" on the distal side measures 2 cm.
  20. Arizona Pennsylvanian Coral

    The corals from the Pennsylvanian Naco Formation in Arizona have not been officially described partly because many are silicified and have lost internal details. Any idea what these corals are with central columns that are vertically striated? Their average length is 2 to 3 cm. I think that they look like Lophophyllidium. Thanks, John
  21. EDIT: see complete post below Ynot's brief post. I found some amazing fossils last weekend north and east of Payson, Arizona in the Pennsylvanian aged Naco Formation. Clear skys and warm temperatures were tolerable because of the tree cover. The star of the show was a 40 cm slab with and upside down silicified Syringopora coral colony that showed the basal branches. Mother Nature started the etching process, I continued it with dilute pool acid. For scale, each coralite is about 2mm in diameter. The next star was a 23cm unidentified sponge.
  22. Any idea what these silicified possible crinoids are? Are they even crinoids? They are from the Pennsylvanian Naco Formation from near Payson. The ones in the photos (both sides are shown) are from 0.8 to 1.5 cm wide. @crinus These two references might be of help. Anyone have access to the photos from these? Webster, G., & Olson, T. (1998). Nacocrinus elliotti, a New Pachylocrinid from the Naco Formation (Pennsylvanian, Desmoinesian) of Central Arizona. Journal of Paleontology, 72(3), 510-512. Webster, Gary; Elliott, David. (2004). New information on crinoids (Echinodermata) from the Pennsylvanian Naco Formation of central Arizona. The Mountain Geologist. 41. 77-86.
  23. Paleozoic Adventures in Arizona

    Here are photos of two trips taken to look for Paleozoic fossils in northern Gila County in northern Arizona. Daily thunderstorms and plentiful shade made the 90 deg. + temperatures bearable. I ran into TFF member ArizonaChris while in the area. In the Martin Formation I found interesting stromatoporoids, now determined to be sponges, that were important reef forming organisms during the Late Devonian. Pine needles for scale. Here are some silicified Martin Formation brachiopods. Nearby are many caves and sinks in the fossiliferous limestones of the Martin and Redwall Formations: up to 100 miles of passages according to a caver. The first one is full of junk metal including two cars. Any idea what the cars are? Here is Tin Can Sink. To be continued.
  24. Cool Fossil Prep Photo

    Here is a cool photo of a silicified Michelina coral that I was trying to extricate from Redwall Limestone with acid. It reminded me of my proposed TFF slogan/motto: "we place fossils on pedestals".
  25. Pennsylvanian Shark Tooth

    Anyone know what this Pennsylvanian (Desmoinian) shark tooth from Arizona is? The tooth is 40mm wide and 30mm from top of tooth to bottom of preserved root. The shape of the tooth suggests that it was a shell crusher. Thanks, John
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