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  1. Doug Von Gausig

    Unknown fossils - Receptaculites?

    The two sides of a single small chunk of limestone show two very different fossils. One side may be a Receptaculites, and the other I don't recognize. The rock was found on the surface in an area of mixed cobble, formerly an ancient riverbed, so the origin is uncertain. Most of the old limestones in the area are Devonian or Carboniferous. The stone's about 4 cm long. The area it was found was also inhabited by the Sinagua people, who abandoned the site about 700 years ago. They could have transported the stone from somewhere or traded for it? Any ideas what these fossils are?
  2. Found on Arizona mesa top. What’s curious is the shell like structure that I have not seen in the many geodes I’ve found around here. See 3rd and 4th pics for best outer shell view. Any thoughts from the community? Thanks
  3. Hello everyone, A while back I was gifted this fairly large piece of pet wood from Arizona. I don't really know what I can do with it as I don't have any equipment to polish or cut rocks like this. I was wondering if any TFF members have such equipment, and if they did how much it would cost to either polish this piece at one or both ends or alternatively, slab it and polish some of the slabs. I don't know if it would be worth the time or money to do so, I am just trying to see what I can do with a piece like this. Thank you very much for any help, Misha
  4. Rocksandrocks

    Two fossils to ID

    I’m hoping to ID two fossils. The first fossil was found in the Boone Formation of Northwest Arkansas. My first thought is ammonite, but the spiral is much looser than what I’m seeing online. The second fossil was found 10-50 miles south of the south rim of the Grand Canyon in Arizona. It was a while ago, can’t remember exactly where I was. Both are about an inch across. Thanks for your help!
  5. Hi All, so I had heard about fossilized coral located in the Western Arizona desert near the Colorado River. So we went out there and did some rock prospecting ourselves. The location is La Paz, County south of Parker, Arizona. Namely, the terminal moraine-like hills about 10 miles south-east of Parker, Arizona beyond the Colorado River Indian Reservation. We found a ton of very interesting sponge or coral-like rocks on top of these hills. So this is consistent with a few other reports online about this. First, let me describe this location as it’s somewhat fascinating if you pay special attention. Parker is located next to the Colorado River south of Lake Havasu, Arizona. As you travel southeast of Parker on Highway 95, you will begin to gently gain 100-150 ft in elevation as the Highway climbs through a gentle alluvial fan formation for about 4-8 miles. Then you will begin to see some very odd elongated, east-west sand hills maybe 50-100 ft tall. You won’t think anything of them until you look at an aerial photograph and realize they seem like giant terminal moraines. They’re extremely consistent in shape and placement, like giant wave ripples. We sampled several of these terminal moraine hills. Per geological maps, these moraine hills are composed of an unconformity of top Bullhead Alluvium coating over the below Bouse deposit mounds. You can clearly see this from a few, open cross-sections of these hills, where most of the hill is composed of a sandy material then very oddly layered with a top layer of dense rocks (1/2 inch up to 6 inch size rocks). Now that’s kind of odd. A series of sandy hills composed with a coating of heavy and dense deposits on top? And more interesting is the model where the present day Colorado River may have been formed when a series of lakes formed, filled up, breached and flooded to create subsequent downstream lakes. At this location an ancient Lake Blythe would have formed from presumably a catastrophic flood from a breach of an upper ancient Lake Havasu or ancient Lake Mohave. Think about it, that would probably explain these odd terminal moraine hills with a unconformity of large gravel rocks on top! Wow. It’s anyone’s guess but it sure does seem plausible. So we sampled these hills for several days. Their top gravels are composed of a variety of rocks. But what’s odd is that many sponge or coral like rocks seem to exist in this top layer of Bullhead Alluvium. These have the same appearance as those described downstream in Yuma on this forum. Also, when we were in Lake Havasu City, we found the exact same sponge and coral like rocks there, too. So at least from Yuma to Lake Havasu City and maybe much further beyond. One must wonder where they originated. The Grand Canyon, other canyons, ancient flat areas around the present day Colorado River? But they seem to be very present in presumably flood gravels. There appear to be some different types. Some are coated and show massive eroded pits and areas exposing their mostly gray cores. By coated, the entire specimen is surrounded by a coating(s), so I don’t believe it’s a piece of a eroded deposit layer from a nearby cliff from a flood, etc. Many have elongated shapes, wide on one end and narrow on the other end. Others are gray core matter only, some showing a bit of coating or not, and their cores show very curious patterns that look very sponge or coral like in nature. Their internal patterns seem biological in nature and marine like and can be seen within some of the partially-eroded coated pieces. We also found some gravel rocks with small crinoid fossils and a few specimens that looked like large coral heads. All of these specimens are highly weathered, consistent if they were part of a massive flood deposit. It’s very cool stuff. It’s everywhere in these Bullhead Alluvium flood gravels. It’s so prevalent, I’ve got to wonder if anything specifically has ever been written about it? Granted it was only a few years ago that evidence was uncovered that may indicate that the lower Colorado River area was once an inland sea estuary during the Miocene to Pliocene, before final formation of the modern day Colorado River presumably from a series of breaches. So it begs to wonder what other treasures this area may hold. I attached pictures of some of the sponge and coral like specimens. Size scale shown is in inches. Comments welcome. Cheers, DJ
  6. Hi All, any thoughts on these specimens? Location is Roberts Mesa in Gila County, Arizona. (east of Payson) The red coral-like stems were found loosely on the ground very near the red trunk and gray matrix pieces. So I’m making some assumptions that the two are related as they were found maybe within 100 meters of one another. And the red stems above looked similar to the red trunks below of course. My first thoughts are some sort of coral but could they be a sponge instead? I’m assuming all are Naco Formation? Comments welcome. Photo size reference is in inches. cheers, DJ
  7. Even though I fancy myself as a self-collector of fossils, I have always been interested and attended shows as they are excellent learning/networking venues. For the past few years, I have been attending the Quartzsite shows. The first times I attended, I was pretty lost since they are actually a series of shows, some overlapping, some not, at different venues. Very confusing. That's part of the charm though since there is much to like about these shows: they occur at a time of the year (winter) when nothing else is happening in much of the country, you can find excellent bargains, they are pretty relaxed due to the extended schedule of shows and they are mostly outdoors which has turned out to be a huge bonus in the age of COVID. My experience is that there are 3 shows for fossil enthusiasts worth mentioning: 1. Desert Gardens This is an RV Park turned into a rock, gem and mineral show typically from January 1 to February 28. Vendors occupy RV parking sized spots, which are larger than your typical venue's vending areas. The show hours are typical business hours seven days a week for 2 months. It is all outdoors and due to its long schedule, can be visited in addition to the other shows. The parking and atmosphere of this show tends to be a bit more relaxed than the others as well. The feel is more wholesale type business, but every vendor I've encountered will also gladly do business with the general public. The common refrain is, "I'll sell the whole table or individual specimens, just tell me what you're interested in and we'll make a deal." I estimate the number of vendors around 50-100. The reason for the wide number is that thanks to the long hours and period, some vendors may not be there or open when you come. Some may not even be fully set up if you go early in the year. 2. Tyson Wells Another RV Park just east of Desert Gardens on Kuehn Street. This is a 10 day show during the first couple of weeks of January, this year from January 7-16. The format of Tyson Wells is the first show is for Gems and Minerals. After that show is a "Sell-a-rama" flea market type show, followed by an Arts and Crafts show. What I saw was quite a few vendors setting up shop for all 3 shows, selling a variety of goods not related to rocks/gems/minerals/fossils. I attended the Gem and Mineral show in 2022, and rock/gem/mineral/fossil dealers were actually a minority, scattered here and there but mostly concentrated towards the eastern end of the show (the northwest corner of Kuehn and Central). If parking and traffic is a concern, you can try going early or late to beat the crowds. In talking to some vendors, it seems that many rock/gem/mineral/fossil vendors will set up show here, then decamp for Tucson afterwards. I estimated the number of dealers in the low double digits, but still worth checking out since you can have first look at their selection before Tucson. 3. Quartzsite Improvement Association (QIA) Pow Wow This is typically a weekend show, extending from Wednesday to Sunday during one of the last weeks of January, in 2022 from January 19-23. Vendors typically occupy no more than a handful of tables, with some inside the building but most outdoors. The vendors are what you would typically expect at your local rock/gem/mineral/fossil show, just much bigger and more than you find in your normal local gem/mineral club shows (~100 vendors). While you're in Arizona, the FLAGG show (one of the first weekends in January) is the biggest show in the Phoenix area. Again, a weekend show, the format is a tailgate show, vendors occupy parking spaces outdoors with typically a handful of tables, although some vendors (i.e. the FLAGG Foundation) occupy dozens of tables. The size of the show is comparable to the QIA show, but there is a far larger contingent of local gem/mineral/fossil clubs at FLAGG than QIA due to their focus on education and outreach. By the way, if you have children, this is a good show to attend as many exhibitors/vendors have gifts or activities for children. Following the January shows, you would then move onto the Tucson shows in February. In conclusion, if you had 2 months to spare and the means, you can attend a world-class show every day for 2 months in Arizona(!!). For the rest of us, that kind of lifestyle will always be the dream while we save our pennies.
  8. This is supposably a Dinosaur egg bought in 1982 at "The Arizona rock & Mineral Museum" I think that museum is long gone, but is the Egg real? Its supposed to be a Parasaurolophus egg.
  9. Mineralsmetalsfossils

    Fossil bone

    Hi everyone, There is a fossil that was found in a wash at the level of the kaibab formation below a pour over. It was found in two separate pieces. Shortly up the wash is the moenkopi formation and above that is Pliocene to Miocene basaltic rocks. The formation above the kaibab was a conglomerate of many different rocks eroding out of the hill and into the wash. The moenkopi is the most recent formation besides the basalt in that area. I did my best to match the formations to the area, but I am basing my information off the geological maps for the location. The Chinle formation is about the only one I know by sight. Let me know if you need more information. I couldn't find anything other than small marine fossils listed when searching that area in PBDB.
  10. After a one year off for Covid the Tucson show will open the last week of January. Here is a link that provides you info to the +40 venues. Arizona still has high daily Covid 19 cases, so some venues or dealer rooms may require you to wear a mask, be safe. https://xpopress.com/showcase/profile/1/tucson-gem-mineral-fossil-showcase Lots of major changes will occur this year with the location of fossil dealers. The Arizona Mineral & Fossil Show which occupied the Tucson City Center Hotel was moving to the El Conquistador Resort but their web site says this show has been cancelled for the next two years. See Link, something might change as we move closer to the date. If you are looking for someone specifically and cannot find them, contact them directly. https://www.mineralshowslld.com/tucson/ Here are the Key Fossil Venues with a link but most venues have some fossils. The Fossil and Mineral Alley Show at Days Inn Timing: Around Jan 27 - Dealers have individual rooms so the timing will dependent when they arrive and finish setup Dealer Listing: (62 Dealers) I don't see major changes from prior years. Great Fossil Venue (Shark/Dinosaur/Invertebrates) https://xpopress.com/show/vendors/25/fossil-mineral-alley The 22nd Street Show Timing: Jan 27 to Feb 13 Parking is a nightmare and $$ Dealer Listing: Few fossil dealers mostly trinkets https://22ndstreet.show/exhibitor-list/ The Big Gem Show at Tucson City Center (CANCELLED) Timing: Same as the other shows Dealer Listing: Only 32 dealers remain. Only one Fossil Fish dealer, Now mostly Gem and Minerals https://www.thebiggemshow.com/ (Web Page Closed Dec 6) Mineral and Fossil Market Place Timing: Jan 29 to Feb 13 Some dealers have individual areas so their opening may be different (earlier) than posted dates. Dealer Listing: Lots of fossil dealers have migrated to this venue including the Black Hills Institute. Tight dealer quarters and parking but may be one of the better fossil venues https://mfmshow.com/ Mineral Fossil Co-Op Timing: Jan 28 to Feb 13 ( some stores open year around) Dealer Listing: (13 Dealers) https://xpopress.com/show/vendors/44/mineral-fossil-co-op Note: Kendal of Moussa Minerals just let me know of a new tent venue (RMGM Mineral and Fossil Show / Oracle Rd) will set up shop at this location. See page 2 for information Moved again to Keno venue Kino Gem and Minerial Show Timing: TBD Dealer Listing: (231 Dealers) Mostly Trinkets, few Moroccan Tent dealers https://xpopress.com/show/vendors/41/kino-gem-mineral-show Moroccan Tent City TBD will see who shows up on Oracle Road
  11. Bridget0813

    Petrified Wood. Is it burned wood?

    Hey there! I was recently given this beautiful chunk of petrified wood. I have found pieces through the years but this is the first I've ever seen with crystals which has intrigued me to learn about them more. I was wondering if this piece is possibly burned wood? It came from somewhere around the Mesa Arizona area I think I'm still trying to confirm that but definitely Arizona. Other then knowing it is petrified wood I would like to hear any info anyone may can give about it.
  12. kmaxx

    coral? Payson AZ

    Hi! Someone directed me to this forum for a possibility of ID'ing these pieces. I collected these loose on the ground the day after a very heavy rain and hail storm, near a wash bed just north of the Whispering Pines area outside Payson, AZ. Someone suggested they might be fossil coral. Any info would be greatly appreciated.
  13. RetiredLawyer

    Finding more bone

    First picture is a clavicle impression which has bone imbedded in the rock. Second is a vertebral or cranial bone. The rest are bone fragments.
  14. brennendeherrera

    What is this please help

    This is a very strange piece , with out me even saying anything about I please help my understand what I have and what you feel u see , thanks ...
  15. RetiredLawyer

    Some odd shaped rock

    I’ve found these rocks near my track fossils and petrified wood. Can anyone shed any light on them?
  16. RetiredLawyer

    Unknown tracks

    These are a few of the more unusual tracks I’ve found. The tridactyl looking tracks are really interesting since they shouldn’t be here in mid-Triassic. The one that looks like a human foot is particularly creepy
  17. RetiredLawyer

    Overview of total collection

    IMG_2038.MOV Here’s a video of my collection as of May. I numbered them a while back and got to 185. That doesn’t include the trackway pieces or what I’ve added since then. It’s been almost exactly two years since I found the first track. Not bad for a sixty year old guy working alone lol.
  18. I have found many Pennsylvanian sponge roots in an isolated area of the Naco Formation near Payson, Arizona. The sub parallel root fibers range in size from 0.2 to 1.2 mm in diameter. The roots are often found growing/covering crinoid columnal sections. Near Pine and at my site the roots are found where Chaunactis olsoni sponges are the most common, but not the only sponge species present. Now I need to find a sponge with roots attached to ID the species of the roots. It is unknown if the silicified roots were originally silica or calcite. I noticed that there are grooves from and matching the diameter of the roots in originally calcitic crinoid columnals and head pieces. What caused these grooves? Two hypothesis: the silica roots grew over the softer calcitic crinoid pieces rubbing grooves into them as the currents caused the roots to sway. Second: the roots had living tissue on the outside that secreted acid that caused the grooves. Knowledge of extant sponge anatomy might help answer this question. Photo 1: average root diameter about 0.6 mm. Photos 2 and 3: detail of first photo. Photo 3: roots growing around section of crinoid columnals with grooves in columnals. Dilliard, Kelly & Rigby, J. Keith. 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. http://geology.byu.edu/Home/sites/default/files/geo_stud_vol_46_dilliard_rigby.pdf @TqB
  19. Rocks n Relics

    Not sure if this is a fossil?

    hello everyone, I'm a newbie here and with fossils and hoping y'all's experience can help me out...I live in Globe, Az and I find some awesome rocks and minerals...however I know nothing about fossils...I found this HUGE rock last year and everyone that see's thinks it might be fossils? I do know the area was underwater "back in the day"...so we have lots of limestone conglomerates that formed. The first picture is of a oval shape something that might be a fossil... it's roughly 4" by 2" width. It has lots of texture to it. The parts I'm asking about that might be bone fossils is at it's tallest is 1 1/2 foot tall and roughly 4-5" wide at the top. There are two of the "bones" one in from of the other and they are the same shape and size. The rock itself is roughly 1 1/2 by 1 1/2 feet tall/wide Weighs roughly 150 pounds. Thank you in advance for help! Sheena Globe, Az.
  20. RetiredLawyer

    More tridactyl type tracks

    Been finding a few of these types of tracks recently. Will be curious to see if they actually are tridactyl dinosaurs.
  21. DPS Ammonite

    Crania Brachiopod

    Crania Crania modesta is a rare calcium carbonate Pennsylvanian inarticulate brachiopod. The shell is very thin and the ornamentation of the shell below shows through. You can see the interior of a near circular 4.6 by 4.8 mm pedicle valve that attached itself to aLinoproductus prattenianus (photo #1). A bryozoan also covers the front and back of the Linoproductus (photos #2 & #4). Photo #2 is a different photo of the same Crania as in photo #1. The Crania has a thickened rim and a sub central knob. Rowell (1965, p. 289) lists Crania as the only Pennsylvanian genus with a calcified pedicle valve as stated by Sutherland (1973, p. 16). The presence of a large bryozoan colony on the backside of the Linoproductus valve (photo #4) suggests why only the pedicle valve of the Crania was preserved. The entire Linoproductus shell with the Crania and small bryozoan colony on top (photo #2) was flipped over allowing the bryozoan to grow on the other side. The brachial valve dissolved away or was broken off from exposure before it was buried. The brachial valve was probable very thin like the pedicle valve. Taxonomy from GBIF. Photo 3 from plate 11, figure 17 from Mudge 1962. Mudge, M. R., Yochelson, E. L., Douglas, R. C. et al. 1962. Stratigraphy and Paleontology of the Uppermost Pennsylvanian and Lowermost Permian Rocks in Kansas. United States Geological Survey Professional Paper 323:1-213. https://pubs.usgs.gov/pp/0323/report.pdf Rowell, A. J. 1965. Inarticulata. In: R.C. Moore (ed.), Treatise on Invertebrate Paleontology. Part H. Brachiopoda, H260–H296. Geological Society of America and University of Kansas Press, Boulder. Sutherland, P. K. and F. H. Harlow. 1973. Pennsylvanian brachiopods and biostratigraphy in southern Sangre de Cristo Mountains, New Mexico. Memoirs of the New Mexico Bureau of Mines and Mineral Resources 27:1–171. Free download: https://geoinfo.nmt.edu/publications/monographs/memoirs/27/ First description in: White, C. A. and St. John, O. H. 1867. Descriptions of new sub-Carboniferous and Coal Mesures fossils collected upon the geological survey of Iowa, together with a notice of new generic characters observed in two species of brachiopods. Transactions of the Chicago Academy of Sciences 1:115-127.
  22. Mr.Waffles

    A Very Tiny Mystery

    Hello wonderful fossil-people! If you and you're gang enjoy solving a groovy mystery, I have a post for you! This rock was found in an area of Northern Arizona that is very well know for producing lots and lots of bryozoan, brachiopod, and crinoid fossils, as well as crystals and geodes. The bit of rock in question was found in the side of what appears to be a broken geode. There is a triangular fragment of stone that does not match the material surrounding it. There is also a white discoloration encompassing the triangle that I've highlighted in green on one of the photos below. The colors in the 3rd photo are a little more true to what it looks like in real life. The geode is kind of a pink-ish color and the triangle "fossil" is a dark brown/reddish color. Given the abundance of marine fossils found in the same location, I wonder if this is also fossil. It just seems so out of place in this rock. I have oodles of bryozoan, brachiopod, & crinoids that I've found in the same location and I can share pictures of these, if it somehow helps So what do you think, fossil or random bit of stone? If it is a fossil give me your best guess as to what it might be... or even give me your worst guess. I'm not picky lol.
  23. Steak_Knife86

    Dinosaur Horn?

    Possible Triceratops Horn and many other dinosaur parts.
  24. DPS Ammonite

    Miocene Lacustrine Stromatolite

    This silicified lacustrine Miocene stromatolite is a trace fossil made by a gram-negative photosynthetic blue-green bacteria. The originally limestone stromatolite was formed as a bacterial mat trapped sediment and precipitated limestone as it grew from the lake floor towards the sun. It shows classic convex layering towards the top. The stromatolites occur in tuffaceous and lime rich lake sediments that might be part of the Chalk Canyon Formation that is bounded on the bottom by basaltic lava and volcanic rich conglomerate and sandstone on the top. Locally numerous silicified casts and molds of reed like plants, their roots, and palm wood occur in the lacustrine sediments. Since the area is under possible scientific investigation I will not give a more specific locality. The Arizona Museum of Natural History has fossils from the site per my showing them the site. The taxonomy is very unsettled as is the author of Cyanobacteria. Taxonomy per International Registry of Marine and Nonmarine Genera: https://www.irmng.org/aphia.php?p=taxdetails&id=110 See also: https://link.springer.com/article/10.1007/s10750-014-1971-9 “The cyanobacteria are named under Botanical and Bacteriological Codes, and the usage of both systems at the same time causes considerable confusion as the rules of the Botanical Code are quite different from those of the Bacteriological one.” Photo 1: detail of photo 2. Photo 2: 9” wide polished cross section cut and polished courtesy of Stan Celestian. Photo 3: 6” wide polished cross section of another side. Photo 4: top of colony. Photo 5: bottom of colony. Fossil Cyanobacteria & stromatolite overview: https://ucmp.berkeley.edu/bacteria/cyanofr.html Interesting paper that suggest Cyanobacteria created calcified structures because of interactions with viruses: White, R. A., 3rd, Visscher, P. T., & Burns, B. P. (2021). Between a Rock and a Soft Place: The Role of Viruses in Lithification of Modern Microbial Mats. Trends in microbiology, 29(3), 204–213. https://doi.org/10.1016/j.tim.2020.06.004 https://newsroom.unsw.edu.au/news/science-tech/stromatolites-–-fossils-earliest-life-earth-–-may-owe-existence-viruses
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