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Showing results for tags 'miocene'.
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This past weekend we stopped in for a few hours at Matoaka cabins on the way home from St. Mary's City (a cool non-fossil historical destination). We found several readily identifiable small teeth and ray plates as well as a few drum teeth and a handful of shells. My guess with this tooth is a posterior cow shark tooth or Carcharhinus? Measuring tape is inches on top and metric on bottom. Thanks, Adam
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Acquired 5/14/2019 Image © David Kn.
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- carcharias
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From the album: Crustaceans
Tumidocarcinus giganteus crab from the New Zealand Miocene. These crabs are incredibely difficult to prepare. This one required roughly 20 hours to prepare. The carapace nor the overall exoskeleton preserved well as there are a lot of cracks but the orange, pinkish hue is a bit unique considering most of these crabs have a dark brown exoskeleton. This crab is roughly 8.5 inches in diameter from tip to tip (legs). -
From the album: Crustaceans
Tumidocarcinus giganteus crab from the New Zealand Miocene. These crabs are incredibely difficult to prepare. This one required roughly 20 hours to prepare. The carapace nor the overall exoskeleton preserved well as there are a lot of cracks but the orange, pinkish hue is a bit unique considering most of these crabs have a dark brown exoskeleton. This crab is roughly 8.5 inches in diameter from tip to tip (legs). -
From the album: Crustaceans
Tumidocarcinus giganteus crab from the New Zealand Miocene. These crabs are incredibely difficult to prepare. This one required roughly 20 hours to prepare. The carapace nor the overall exoskeleton preserved well as there are a lot of cracks but the orange, pinkish hue is a bit unique considering most of these crabs have a dark brown exoskeleton. This crab is roughly 8.5 inches in diameter from tip to tip (legs). -
From the album: Crustaceans
Tumidocarcinus giganteus crab from the New Zealand Miocene. These crabs are incredibely difficult to prepare. This one required roughly 20 hours to prepare. The carapace nor the overall exoskeleton preserved well as there are a lot of cracks but the orange, pinkish hue is a bit unique considering most of these crabs have a dark brown exoskeleton. This crab is roughly 8.5 inches in diameter from tip to tip (legs). -
Found very little yesterday. This is somewhat unique as are all earbones. Found in a Bone Valley area with no Pleistocene material but with pre_equus horse teeth. At first, I thought "baleen whale", but it is too small. Asking @Harry Pristis and @Boesse to evaluate, but encourage all comments and suggestions. Jack
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Needed to get out and get some exercise. Relatively cool and dark in the morning, the full foliage shade was nice, surprisingly little water in the creek. I worked one spot hard, found a few partial ecphora, lots of sand tiger teeth, a few angel and drum teeth. A bonito nose a Tilly bone and what probably was once a bonito nose. One three pointed cowshark tooth which I lost when I fell. The highlight was a nice hemipristis (don't find many of those or tiger or mako in this site. And no megs). Bits and pieces drying to go through later.
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My family and I have been in Maryland since Thursday evening. The past two days have involved alot of walking and intense heat. My calves and feet are sore and I have got a good sunburn. Friday morning we met up with forum member @RCW3D and his daughter. He took us out to a Miocene exposure along the Potomac River. We started our hunt a little before 10am and I think we got finished around 2pm. We all managed to find some goodies. RCW3D'S whale vert and articulated marlin verts definitely were the prize of the day. But I was happy with what I found though nothing as exciting. I found an assortment of sharkteeth, a nice shark vert, a decent size fish vert and misc bone pieces. Devin did pretty good himself scoring a beautifully colored snaggletooth, a drumfish plate ( which he misplaced) a fish jaw minus the teeth, a nice shark vert, and some other goodies. My wife and older son found a few teeth but weren't really hunting. RCW3D helped my kids out by pointing out where teeth were by drawing a circle around them and sometimes just handing them stuff. We had a really great time and appreciate the time he spent with us. After we left, we grabbed some lunch and headed over to Mataoka cottages so the boys could swim and I wanted to do a little shell hunt. We stayed a couple hours found a few shells and sharkteeth and went for a late dinner. Today my wife wanted to go into Washinton DC, visit the monuments and a couple museums. I won't bore you with all the details. Basically a whole lot of walking in scorching heat. Anyways we are headed back home in tomorrow morning. A short trip but it was a good one. Here are some pics. #1- My finds
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This is an excellent find, but I am unsure how to identify it and I also wanted to share the moment. Why excellent? Any fossil tooth with complete roots is rare and any Manatee or Dugong molar in any shape is rare for me. In 10 years , I have found 5 or 6 of these in Peace River hunting. So my question: Can a Trichechus manatus molar be differentiated from a Metaxytherium floridanum molar and , if so, which is this fossil? Details : Crown height - 45 mm, Crown length - 26 mm; Found in Peace River Watershed. Thanks for all comments and suggestions!!!
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I'm curious if anyone here can shed any light on this. I collected this bit of fish bits from a coastal miocene marine formation here in Oregon. I have it labeled as fish possibly tail pieces. Recently i have seen bits of cylindracanthus fish from other locations in the us and uk that look rather similar. Almost none of the fish from this Oregon location have really been described but im hoping some of you that are familiar with cylindracanthus material might be able to weigh in on if that might be what this is or not. Nick
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I have to say that today was a fun day, I took @Darktooth and his family out for some fossil hunting along the Miocene areas of the Potomac. We had a beautiful day for it, just wish that the clouds that had been forecasted would have showed because it became extremely hot out there! Nevertheless, we persisted and spent about 5 hours looking for fossils and we were all wiped out by the time we got back. I know that Darktooth will be posting his own report, the following is just what my daughter and I found. I had a great time with you Darktooth, I hope you and your family enjoy the rest of your vacation! Total haul of our "small stuff" Nice "doorstop" whale vert A nice hastalis, really the only tooth I found Crab, I just started to look for these. Never really had the eye for them before. My daughter found this piece of fish jaw with a tooth in it. She really didn't know what she had but thought it looked neat and put it in her bag. I found this fish vert in a chunk of matrix A couple of small shark verts A little ecphora Now for the really cool find, definitely a trip maker and my best find this year...three attached verts that have been tentatively identified as marlin. Dr. Weems will get a look at them on Monday so I may get an updated ID then.
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Hey all, found this today at our private site. Looks like a ray plastron? Never seen it before. We also found a nice gator tooth too.
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I would like to try to prep a whale vertebra I found, but I have a few questions before diving into the preservation part. My questions come in 2 parts: Paraloid suggestions and matrix removal questions. Paraloid: For something this big, should I attempt to find a container and dunk the whole thing in the paraloid solution, or should I use a brush to go around the whole surface? Any suggestions for the ratio of paraloid to acetone? 1:10? 1:20? I've read different ratios thrown around, but I'm not sure what is best for which situation. Matrix removal: There is a large section of material on the under side of the vertebra that I'm unsure about removing. This rectangular section seems to be much harder than the rest of easily removable soil. Even though it transitions from reddish to tan in color, it is all the same hardness. Should I even attempt to remove it, or just leave it? It's clearly not part of the original vertebra, but I'm not sure what it even is. Thanks a lot for any help and/or suggestions! Fossil ID post with additional pictures:
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Earlier this summer I had a chance to dig at Slow Curve at Ernst Quarries. A few teeth were found along with a small dolphin vertebra, but the best find was this large whale(?) vertebra I pulled out as the rain clouds were quickly approaching. From my internet research, I believe it is a whale lumbar vertebra, but that is all I could determine. Whatever it is, I feel lucky to have found it and want to know as much as I can about it! Is there any chance to pin down anything more specific about this piece, such as species? Ideally, I would like to reconstruct the broken processes and make a display. Are there any collections of images for whale vertebrae that could also help with identification? (I couldn't find any good sources while searching) Am I correct in thinking the two parallel broken processes in the second image were the top (dorsal?) of the bone? Is it possible to tell which way the bone faced toward the head and tail originally? I appreciate any help that you guys and gals can provide! Each of the photos has a US quarter, Euro, and centimeter scale for reference. (I first tried photos with lights on both sides, but then the shape of the vertebra was very difficult to see.)
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From the album: Virginia Miocene
Chesapectin nefrens Westmoland County, VA Choptank Formation Middle Miocene C. nefrens is fairly common in the Choptank Formation, but the level of sculptural detail preserved in this particular specimen just blew me away when I gently brushed off the loose sediment. -
From the album: Virginia Miocene
Chesapectin nefrens Westmoland County, VA Choptank Formation Middle Miocene C. nefrens is fairly common in the Choptank Formation, but the level of sculptural detail preserved in this particular specimen just blew me away when I gently brushed off the loose sediment. -
Went to Virginia a few months ago and came home with a few Chesapectin nefrens encased in solid rock. This one was only exposed as a ring of shell material in a ball of clay, calcite, iron ,broken shell and who knows what else. Normally I prep things with soft brushes, dental picks, a water pick, and very gentle fingers. That wasn't cutting it this time and I had to get aggressive. I spent 3+ hours with a rotary tool and zero practice. It's no museum piece, but it's not horrible. I could simply collect the same species, from the same member of the same formation, at a much closer spot, where the matrix is much looser, but I gotta learn sometime. Suggestions for next time?
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Went to Virginia a few months ago and came home with a few Chesapectin nefrens encased in solid rock. This one was only exposed as a ring of shell material in a ball of clay, calcite, iron ,broken shell and who knows what else. Normally I prep things with soft brushes, dental picks, a water pick, and very gentle fingers. That wasn't cutting it this time and I had to get aggressive. I spent 3+ hours with a rotary tool and zero practice. It's no museum piece, but it's not horrible. I could simply collect the same species, from the same member of the same formation, at a much closer spot, where the matrix is much looser, but I gotta learn sometime. Suggestions for next time?
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It's been a long while since I was able to fossil hunt. To go out today with a decent haul really made it rewarding. The location was on a private beach, and the weather was perfect. A bit of wind, around 78-80, warm water, and clear skies made the beach beautiful. We hunted for around two hours on the South side with minimal rewards, some really small teeth such as hemis, makos, and the like. The hunting started to pick up when we made our way over to the North Side. As soon as we arrived, a hemi around 1 1/6 washed up. I knew I was going to like this beach when a second only a little smaller washed up after a minute of hunting. We worked the beach for another hour, pulling a mako of around 1 1/4 inches (broken root) from the surf, and then another, really nice 1 inch mako in the same spot. We met a certain Steve Grossman on the beach, who invited me to the Calvert Marine Museum's sharkfest to help him set up, talk about, and look at his hundreds of megs. If any of you MD folks show up, i'll be there! The Beach
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I am sifting with a 1/4 sieve in a layer of what I think is original ocean bottom (Florida). I found 2 small teeth that I thought were Mako and Sandtiger, but now I think neither is correct. The darker tooth without a pronounced nutrient grove is C. hastalis found years ago in the Peace River. Additional photos of Shark tooth #1 Additional photo of Shark tooth #2
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Finally had a nice day at the beach, very early low tide, light breeze, manageable surf, clear visibility. Yet I found next to nothing. The highlight was a nice coprolite burrow, in great shape. I was reduced to picking up sea shells (don't know if the one shown is even a fossil, but don't see many of this type). Few teeth. Nothing big, but there's always that chance! Perfect conditions BUT we have not had a good storm from the north to blow stuff up on this southern exposure beach in a month. There were few oyster shells visible and the debris was mostly black wood and pieces of iron (probably from 300 years of boats/ships). I'm a pack rat so also picked up some 'whale" bone and a weird little bone (?)- like piece that I need to examine more closely. I'm guessing I need a new spot until the crowds thin out and the weather shifts from the north. October?
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These elusive crustaceans are found within the Lincoln Creek formation near Astoria in Washington. During the Eocene, Grays Harbor was a hub of activity for marine life. This was shortly after the dinosaurs went extinct and life was blossoming once again. The Lincoln Creek is primarily formed from siltstone and marine deposited sandstone where concretions containing the ancient remains of crabs and other fossils exist. Calcareous concretions, many of which contain megafossils[1]. Like other crabs (i.e. Fiddler) these crabs have a dominant claw which is aligned on the right side of the crab. There's some evidence online which suggests this dominant claw was used to attract mates, defend themselves, and vie for territory. These crabs are difficult to prepare requiring on average twenty to forty hours of preparation time as the concretion (nodule) they are encapsulated in is condensed. Most of the sites once accessible within the formation are now closed to the public and the lands are now privately owned. Sources: [1] GS The Lincoln Creek Formation Grays Harbor Basin Southwestern Washington (BEIKMAN, RAU, and WAGNER) : https://pubs.usgs.gov/bul/1244i/report.pdf
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Picked this up yesterday. It is easy to get excited on a small package. Looks like G. aduncus symphyseal but is much wider than the ones I see on a google search.
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