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Several days ago I ventured to a Devonian desert locality near Superior, Arizona. I found the largest fossilized coral colony that I have ever found: 2 ft across. A giant Iowaphyllum nisbeti coral was covered over it’s entire length with several inches of a stromatoporoid sponge. I should have taken a photo, but it was not very photogenic; it looked like a white ledge in cross section. First photo is a piece of light colored Iowaphyllum nisbeti coral covered with a medium gray calcitic stromatoporoid coral that is about 8 inches across. The top of the coral is pointed up.
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Hey guys! I’m going to be in Arizona for a few months and need to get my fossil hunting itch scratched! I’ll be viewing the petrified forest (and not taking anything of course), but I wanted to know where I could go to find some fossils. I will be getting a permit. As someone who hunts heavily in Florida I can’t wait to see the difference in Fauna and age in Arizona! let me know what you all recommend.
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This dolomite stone was discovered near Chasm Creek, central Arizona. It appears to have the fossilized impressions of raindrops splashing into a fine muddy surface. The stone seems to be dolomitic, as HCl causes a low fizz, unlike typical limestone's more energetic fizzing. Most of the "splashes" have the central "rebound" splash seen in my high-speed imagery of water droplets. That central rebound appears to have been broken off over time. Does my assumption that this is a somehow frozen-in-time rain shower make sense?
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Three of my family members found this footprint in Lake Powell, Arizona last October 2020. They differ in what they say the size is from 4 to 12 inches, but my husband is probably the most reliable measurer and saying 12 inches. They looked for more quickly but did not see any. The photo of scenery has a person in a white shirt in the upper central middle in the shadows it was right there or right below there where they found it. A university professor has said it is prehistoric. I did minor searching for clues and the only thing I have so far is it may be a therapod (dilophosaurus?) from the
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It appears that the Tucson fossil show will happen, but greatly reduced, with a scheduled start on April 8th. The Governor in Arizona also just dropped all Covid 9 restrictions but I'm not sure Tucson's mayor supports or will follow that call. From what I can see its not the best year to come to the show with lots of venues canceled and many dealers will be a no show. What to expect: Big changes were already expected this year with the Arizona Mineral and Fossil Show moving from the Tucson City Center Hotel (TCC) to the El Conquistador Golf and Tennis Resort 10 miles a
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Hi, this was found in a dry wash in Phoenix, AZ. It was pretty dirty and dusty before I cleaned it off. It has an odd shape, it’s angled and curved. Don’t have any other info really. It feels how I would imagine a dinosaur skin would be though... or maybe dragon.
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Second picture is what appears to be a tridactyl track. First picture might be also. According to the paleontologist there is discussion of the possibility of dinosaurs being around in this time period.
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This is a Late Devonian sponge collected from the Percha Formation found at the type locality on Brandenburg Mountain in Pinal County, Arizona. This sponge, has the largest complete head reported. Although mostly covered in calcareous sediments and maybe caliche it has the best preserved spicules of the species that I have seen; better than the photos in the Rigby reference below. First photo is a close up of the star shaped spicules that average 1 mm across. Second photo is of the top of sponge that is 70-75 mm across. First published in: Rigby, J Keith; Dietma
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A friend cut a polished a silicified lacustrine Miocene stromatolite from central Arizona that I found. Thanks Stan C. It is about 8 inches in maximum length. Two faces were cut that show the upward convex growth. I am currently looking for a researcher to help write a paper about these and the other plant fossils that occur in the area. A piece that was cut from the same colony as this piece is being donated to the Pinal Geology Museum in Coolidge, AZ. https://pinal geology museum.org Another Arizona museum wants one. I am seeing if other local ins
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Hello, fossil friends! I'm a first-time poster to the forum. I've had this little fellow for several years now. I found it hanging out among the gravel decorating an apartment complex in the southwestern United States; Tucson, Arizona, to be specific. I cannot explain why it was there, unless it was somehow ignored as a rock, or discarded by someone who no longer wanted it, but all the same, I was aware of the general shape of an ammonite, and brought it home with me because, well, its spiral was pretty! There are several dry rivers about the area, but I know next to
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Could use some locals knowledge. I'm in Phoenix and looking at making a run to Quartzsite to look for some trilobites to take home. I was there years ago but can't remember which area the fossil vendors are in? I've been mostly to the area north of the highway that is almost all "odd ball" stuff. Thanks Steve
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A Worldwide Bibliography of the Grand Canyon and Lower Colorado River Regions (open access PDFs)
Oxytropidoceras posted a topic in Fossil Literature
The below publications have to be seen to understand the enormous volume of information that they contain. Also, the number of pages listed below are correct and are not typographic errors. Spamer, E.E., 2018. A Worldwide Bibliography of the Grand Canyon and Lower Colorado River Regions in the United States and Mexico. 1535–2018. Raven’s Perch Media. 11,728 pp. Spamer, E.E., 2021. Cartobibliography of the Grand Canyon and Lower Colorado River Regions in the United States and Mexico 1535–2021. The Plains and the Rockies : a critical -
Been digging my new area. Finding large area with what seems to be deep mud. Lots of partial, poorly impressed tracks so far. From the exploratory holes I’ve dug the area seems to cover at least an acre so hoping to find some good things.
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Out walking and flipping rocks as usual and found a new site. I don’t recognize most of the tracks.
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I run across these guys frequently in the Mississippian Redwall Limestones around Arizona's Verde Valley. They are generally accompanied by lots of Crinoids and solitary Rugose Corals. They're always this oval shape with segmented structure. They look like an isopod, to me, but could be some other crustacean. Any help out there for the identification of these "bugs?"
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This little thingy was in Mississippian Redwall limestone in central Arizona. It was in a section of the Redwall with very few other fossils. It's about 10mm long and 7mm wide. What do you think?
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Found this today. Rock is about 12-14” long. Paleontologist thinks it looks organic but doesn’t know what it is offhand. I’m thinking fossil unicorn, but I could be mistaken. Anyone?
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I found another Ensiferites brandenburgi sponge that is now currently the largest ever found at 7 cm x 7.5 cm across. Part of the top displays lots of 1 mm spicules. Unfortunately the top of the calcareous sponge is mostly covered with caliche and possibly the limestone matrix. Is there any hope to prep this to expose all the spicules on the top? How? This could become a near museum piece thus I don’t want to practice my prepping skills in it. Help @Ptychodus04.
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Started hitting another good load of rocks. Found the one huge chirotherium. Some interesting tracks I can’t identify too.
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This is a work in progress. I will be adding multiple photos over the next day or so. This is part of my Arizona Paleontology Guide. My collection of Arizona sponges. Self collected unless noted. Actinocoelia maeandrina Finks 1960 Permian Kaibab Limestone Coconino County, Arizona north of Pine. 13 cm wide. link link Other side of Actinocoelia above. Permian Kaibab Limestone Coconino County, Arizona, north of Pine. 13 cm tall. link Chaunactis olsoni Dilliard & Rigby 2001 Pennsylvanian
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I’ve got 186 pieces that all pretty much fit together. I numbered them and took photos to send to a paleontologist who is going to try to photoshop them together. I got the first two together.
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Found in sandy wash in North Phoenix desert after rainfall. Please identify, and if more pictures needed let me know.
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This was found in North Phoenix sandy wash area after rainfall, near another fossil that looked like teeth, but the structure seems to have a star like pattern in the center of the rectangular seam.
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The attached photo is a group of Thamnopora corals found in the Devonian Martin formation - dolomites of central Arizona's Verde Valley. There is also a group of tabulate corals that I suspect are Syringopora sp.. but some collection notes by others don't show this genus, but they do show Aulopora sp. as found in the same location. See the small worm-like cluster near the center of the image. Can any of you confirm which genus is in the image?
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I believe this is a Bryozoan. It is about 14x16mm (about the size of a dime), and is on Martin formation Devonian dolomite from the Verde Valley in Arizona. Any opinions will be appreciated!
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