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  1. Novak

    Tooth identifications!

    It is almost layered like a shark tooth. I found it on the sandbar on the Colorado river in south Texas. I’ve seen a lot of teeth but never saw any close to looking like this one. Any clues or ideas would be very much appreciated. Thanks
  2. 80squeen408

    Petrified Cactus?

    Found these just off the lake. Looks like a prickly cactus. No expert and would love to hear if anyone knows or has seen these. I’ve searched and not been able to successfully ID. Sonoran Desert, Colorado River, Lake Mohave.
  3. I stopped at Beason's Crossing on the Colorado River in Columbus yesterday and found this fossil while on my rock hunt. I'm leaning towards a bison tooth fossil, based on my internet search but would love any insights from such an experienced group.
  4. Hey everyone, just joined the forum to ask for opinions on this item. I was out on my Native American Reservation in Parker, Arizona and walking along the beach of the Colorado River outside of our Casino. I stopped to find some cool stones in the water and came across this thing that I immediately thought resembled a shark tooth. I’m no expert, but things like this tend to pop up out in Arizona. I reached out to a department at the Los Angeles Natural History Museum, seeing as they are only a 20 minute drive from where I live, but I haven’t heard back from them yet. Any thoughts?
  5. Brandon B.

    Possible Mammoth Tooth Fragment?

    Found this on a sandbar of the lower Colorado river in Southeast Texas. Found many other fossils but nothing that resembles this.
  6. GPayton

    Colorado River Antelope Tooth?

    Found this little artiodactyl tooth on one of my trips to the Colorado River near Wharton, Texas about a month ago and have had some trouble getting a concrete ID. Any teeth other than bison or horse are basically impossible to find in the Brazos and so I'm way out of my depth with this one. I'm assuming it's too small to be camelid and the pictures I've seen that most closely resemble it are of antilocaprid teeth. This one must be an m3, the third lobe is just broken off (which you can see pretty clearly in the third and the fifth pictures). The occlusal surface is 1.5 cm across but obviously would be longer if the rest of the tooth was still there. As always, thanks for looking, and I'd be incredibly grateful if anybody can confirm my suspicions or point me in the right direction. I'll tag some of the Pleistocene experts that have been particularly helpful in the past: @Harry Pristis @Lorne Ledger @garyc @Shellseeker - love that these guys are a part of this forum!
  7. GPayton

    Possible Antelope Tooth

    From the album: Texas Pleistocene II

    Capromeryx sp./Antilocapra americana (?)
  8. GPayton

    3/6/22

    From the album: Texas Pleistocene II

    A return to a previously visited location. Notable finds include a horse proximal phalanx, three pieces of mastodon/mammoth ivory, an antelope tooth, a beautifully-colored horse tooth, a fragment of mammoth skull, and a section of peripherals from a small tortoise.
  9. GPayton

    Horse Tooth (Lower)

    From the album: Texas Pleistocene II

  10. GPayton

    8/7/21

    From the album: Texas Pleistocene II

    All finds collected from two point bars across from one another. Notable finds include half of a camel metatarsal, a deer antler, a bison tooth still attached to a fragment of jawbone, a camelid tooth, and half of a giant armadillo osteoderm.
  11. GPayton

    Camelid Tooth

    From the album: Texas Pleistocene II

  12. GPayton

    Bison Molar in Jaw

    From the album: Texas Pleistocene II

  13. GPayton

    Camel Metatarsal

    From the album: Texas Pleistocene II

    Hemiauchenia macrocephalus
  14. GPayton

    Horse Tooth (Lower)

    From the album: Texas Pleistocene II

  15. 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
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