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Showing results for tags 'South Dakota'.
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Found this in South Dakota with other petrified wood. I’m just wondering if this piece is for sure petrified wood, or just a rock? Thank you!
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Found this near little elk creek in Piedmont, SD at the base of the Black Hills. After some research, Pennsylvanian age shark material has been found there in the past. These are much smoother than some images I have seen online. Thoughts?
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Hello, I recently bought this tiny bone fragment, a supposed piece of Tyrannosaurus rex vertebral process, from the Hell Creek Formation of Harding County, South Dakota of USA. I know nothing about ID'ing dino bones or bones in general. The seller's rationale for the ID was that the porous honeycomb structure is diagnostic of large theropods, with the only one in this formation being T. rex. Does the ID seem correct? Is this T. rex proper or is that impossible to determine? The piece is 3 cm long. I've propped it up to better visualize the large pores inside the fragment. Also, I'm wondering what the black, chocolate-looking substance filling many of the pores is. Is that just what the matrix looks like? Thanks,
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My Spring trip this year was quite a challenge. Last year we had oppressive heat, it was extremely dry with high winds. This year it was rain, rain and more rain and cool. The ranchers however are in heaven with pastures that are green, green and green. Hopefully it continues for them through the summer. So, we had a few rainout days, lots of drizzle and had to deal with gumbo feet, slippery cliffs and wet bones and matrix. Not the best of conditions for collecting and the group's results showed that. On the downside the day we departed Belle Fouche, where we stay, a very bad storm hit with tennis size hail, 70mph winds and lots of flooding. Unfortunately, there was lots of damage to homes, businesses, vehicles and roadways. Lots of work getting that community back to normal. I'll start with the down days. Visited the BHI to dropoff some specimens. Pete Larsen is currently doing a study on the number of Leptoceratops that exist in the HC formation and wanted to see my maxillae to cast and study. He showed us skull elements that pointed too two distinct species. These are most likely associated since they came from the same deposit. Pete showed us a beautiful replica, that he recently acquired, of Raptorex which is a dubious dinosaur. It's actually a juvie Tarbosaurus. BTW the juvie bones are identical to an adult one. Hmm Trex and Tarbo are very closely related...so does that mean that juvie T rex bones would be similar to that of an adult. A new Stan replica was getting ready to be put together A visit to the Carter County museum is a must on a rainy day Their Anatotitan Dinosaur - actually an old Edmontosaurus Triceratops T rex Nanotyrannus Jane
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More goodies from the same site as the sandstone nodules. Some of this looks like wood to me and one seems highly probable to be a bone fossil. Sorry no metric on the tape measure I'll look for a duel standard measure next time im in town.
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Found these in southwest South Dakota. Looked at thousands of images online before troubling you fine folks. Found in an arroyo below layers of possible fossilized bone and a layer with a variety of chalcedony/agate
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Another one looking to ID. Judging by some of this bone’s characteristics, me and some friends are leaning ankylosaur. It looks similar to a skull piece I saw posted online as well. What are your thoughts?
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I found this specimen where I have found most of my others, near a cow pond off of Vermillion Lake about 16 miles from Sioux Falls. I am very curious as to what it might be true to it's smooth and refined shape.
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Mammal Brain Endocasts from the White River Badlands of South Dakota
Nimravis posted a topic in General Fossil Discussion
I was looking at some of my collection yesterday and dextrose take pictures of my better mammal brain endocasts from the White River Badlands of South Dakota. The first piece is exposed on a partial skull of an Oreodont. This next piece is my favorite and I believe it is from an Oreodont. These other pieces I can only guess, but I would also think Oreodont. This small one appears to be from a rabbit. This last one was ID’d as coming from a Hesperocyon, but cannot confirm that.
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I have 2 small selections of shark teeth that I recently acquired in a collection that I had purchased. These teeth are supposed to have been collected in North Dakota and South Dakota. The first selection was collected on 4-3-1986 in Moffit, North Dakota in the Cannonball Formation, which was referenced by the collector as being Paleocene (58 MYO). The next selection was collected in Edgemont, South Dakota from the Late Cretaceous, Green Horn Formation. Any help on these would be appreciated. Thanks
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Hello, I have just received this partial lower jaw, it is supposed to be from Leptomeryx evansi, but i have seen many skulls of L. evansi on the internet, and this doesn't look similar. It comes from the Oligocene of Orella member, Brule formation; South Dakota. I have got three questions; Who did this jaw belong to? What part of the jaw did these teeth occupy? Is that hole on the first photo normal? Or was made by an animal or disease? Thanks to everyone!
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Hello, I had a question about the coloration of the beautiful South Dakota ammonites from the Fox Hills formation/Pierre Shale. Namely, many Hoploscaphites/Discoscaphites ammonites have a milky white nacre of the shell, whereas others seem to have a vibrant red/brown sheen. For example here are two photos of Hoploscaphites nicoletti I found demonstrating the two types of colorations: I was wondering what causes the difference in this coloration, and whether one is more rare/valuable than the other? I want a nice South Dakota ammonite for my collection and I'm contemplating options. Thanks!
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Fossil Friday once again! This is the last of the South Dakota exploration trip, hunting the Pierre shale for cephalopods and hopefully a mosasaur. Although the first half of the Pierre shale exploration went pretty slow, it wasnt without a few nice finds. The second part, we were extremely fortunate in that we got to meet Neal Larson and hear a short talk about the local Pierre shale formation, and then he took us out to his personal hunting site.
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Hi everyone, I found this little, mostly complete vertebra in the Hell Creek formation of South Dakota in 2019. I don't really know what to make of it as it's very porous, and amphiplatyan (flat on both sides), although I'm not sure how much of that could be attributable to wear. I believe it's safe to cross of squamate (due to lack of concavity) and champsosaur (overall shape) off the list. While most of the crocodilian verebrae I have found in the hell creek have have a convex and concave end, I am aware that some can be found that are flat sided. The porosity of the bone makes me hopeful that it's theropod, but am not by any means discounting mammal, croc or any other possibility. Dimensions are 1 cm in length, .8 cm in height from base to the end of the process and about 1.2 cm. I would like to know the opinions of my fellow members.
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Hi everyone, I was just browsing @PrehistoricFlorida's website and my eye was caught by what was labelled as a pocket gopher femur (trust me there were many more impressive fossils that caught my eye as well). Reason being, I found a very similar bone on a hunt in South Dakota's Hell Creek formation back in 2019. I kept it, hoping in my heart of hearts that it was fossilized, but keeping my expectations low. The rusty staining on the bone made me think there was a chance it was just a beautifully preserved Cretaceous limb bone, but I knew it was most likely recent. It's about 2.5 cm long and .7 cm wide at the proximal end. I'm interested in your opinions about whether or not I can confirm this bone as modern/recent. Floridian specimen. Dakotan specimen.
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Happy Christmas eve, Merry Christmas, Happy Holidays and a prosperous new year! It may be Christmas eve, but its also Friday, which means its a Fossil Friday. I missed las week due to being sick. Today's video offering is from the first day of a long, multi-day fossil exploration trip in South Dakota.
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Just returned from my fall collecting trip to South Dakota. Will focus on my finds and I've attached a couple of prior trips to see more of the area, fauna, finds and collecting gear. Spring 2021 http://www.thefossilforum.com/index.php?/topic/115998-spring-dinosaur-dig-in-south-dakota/ Fall 2020 http://www.thefossilforum.com/index.php?/topic/109554-collecting-trip-hell-creek-formation/#comments Before I get into my new finds here are some prepped items from my last two trips that I have yet to share A possible Troodontid metatarsal A very weird bone, showed Pete Larsen and he's leaning to a pathologic Digit III Edmontosaurus toe bone. Very odd bone. Good size An nice size Edmontosaurus cervical vertebra about 7.8" High and 13.5" wide Edmontosaurus, a big Chevron, 14.5" long Edmontosaurus, Metacarpal III - 10" Long I was cleaning this Edmontosaurus Digit IV -1 toe bone and a surprise hole popped up became more interesting as I continued clearing it. It has the outer shape and interior profile/curvature of a tyrannosaurid tooth. Is it predation ? I went to show it to Pete Larsen but he was at the Denver show.. Will see him at Tucson. There was no predation marks on the opposite side so not sure. The preservation is pretty solid. Edmontosaurus - Left Dentary about 23 inches long.
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I know its not the most recent trip, but I finally completed the video for this annual trip to hunt for dino fossils in the Hell Creek fm of South Dakota. Next week I should have the video of the prep of the Neural arch and spines finished.
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Hi all, with Covid making it impossible to attend any shows here last year I was able to visit the Munich Show last weekend. Among others I’ve bought this tooth. Ive learned from you guys not to trust the ID done by the seller so after reading some posts here I doubt that the tooth is a ankylosaurus magniventris. To me it looks more like a Thescelosaurus. Am I correct with this opinion? Details provided by the seller: Hell Creek Formation North West South Dakota Thanks in advance for your expertise!
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My wife and I just got back from a three night trip to Hot Springs, South Dakota. Our mission was three fold. First, a visit to Mount Rushmore has been on our bucket list for several years. Second, I recently I’ve been in touch with Richard White who was previously the Director of the international wildlife museum in Tucson Arizona and most recently has become involved doing research out of the mammal lab at the Mammoth Site in Hot Springs. He has been studying Capybara and publishing papers for several years. After seeing pictures of the skull that I found on the Brazos River a few years ago, he contacted me oh to let me know he was interested in seeing the skull.
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Today I got this mostly complete Subhyracodon skull from the White River formation, South Dakota. Right now it still looks a bit rough since it's been crushed a bit and there's a bunch of sediment stuck all over the place. The specimen has been pretty well stabilised. So it's not very fragile thankfully enough. Almost all the teeth are present. Only one maxillary tooth is gone and the very tip of the premaxilla is gone. The 2 posterior premax teeth are still there, but the anterior ones are gone. Roughly half of the braincase is also missing on the back of the skull. Otherwise the skull is quite complete. Initial unpacking. Starting prep outside After some exploratory prep using dental picks. I will likely start removing much of the bulk of the matrix in areas such as the orbit and nares with powered tools. The different isn't very visible right now since I was mostly working on small areas and further cleaning up areas where bone was already mostly exposed. Stay tuned for more!
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This specimen was found north of Red Shirt, SD. Is this a bone fragment?
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This bone fragment was found east of Red Shirt, SD. Any ideas about the type of animal and bone?
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So I bought this ammonite at a shop while I was on vacation but it didn't have the species/genus with it. So I would really like to know what the species is (if possible). Thanks in advance!
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Finished my latest prep. Now, I realize that in the worlds of both commercial and academic paleo, this is a useless, junk fossil. Its an unassociated, partial in poor condition, and any final monetary value doesnt meet the time invested in the prep. However, its special for me in that its my first "wild" find. I hiked, explored, tracked the float, found the end of this in the face of a wall, then excavated it. I was hoping for a much more complete fossil, but this was it. It is highly fractured and deeply root rotted. But I carefully disassembled all its parts, cleaned them, consolidated them, reassembled into proper positions and finally repaired the gaps to strengthen it. Now, I've dug and prepped lots of fossils over the last 12 years, but all have come from sites someone else found. They did the leg work and established the quarry, I just dug in it. Nobody knew this was there until I found it. Im still hopeful theres more of the animal scattered behind it. An Ed. vert centrum washed out from a few feet away. Hopefully I'll get the chance to check the site again. Just a side comment... I hate prepping this type of fossil. I glued and consolidated this as I uncovered it, which also glues all the matrix in place. That helps prevent the fossil from collapsing into gravel en route home, but then I have to dissolve the glue and completely disassemble all the broken chunks, then pray I can put everything back where it belongs. anatomy and taphonomy. Every fossil tells a story and the following is my attempt at reading that tale. I found a great PDF article https://archives.palarch.nl/inde.../jvp/article/view/447/439 specifically about the pes of hadrosaurines. It would appear my fossil is the distal end of Metatarsal III, likely left side. The erosional break was at the point where MT-II and MT-IV were located, and the bone was pointing distally into the matrix, so no other metatarsal bones would have been remaining if deposited in articulation. Phalanges III was not found on excavation, although it is possible to still be in situ and just more separated than the distance I examined. However, the likely reality is that this indicates a disarticulated and isolated element. The measurement on the width is 160mm which would make it an adult, although not at the largest size. The fossil has a high degree of fracturing which is likely due to a combination of freeze/thaw cycles and plant root invasion. Beyond this, the fossil still has a mostly intact surface which says that it did not suffer long term surface weathering or osteophageous beetle predation. The in-situ damage was confined to the highest points, which shows it possibly suffered peri-depositional damage. The matrix was a loosely consolidated mudstone without associated gravels or stone inclusions, indicating a low energy environment such as a delta, marsh, or low flow river. Walter Stein believes the layer to be a continuation of a densely fossiliferous, multi-taxic bone bed discovered about 1/4 mile away. The fossil as I started prepping. After clearing off the matrix. distal end proximal end prepped and repaired
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