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Donating My Beauty
I_gotta_rock posted a topic in Partners in Paleontology - Member Contributions to Science
When I found this baby in a lump of sand that had fallen out of the cliffs, it took my breath away! Even in museums, I had not seen an Isognomon shell so complete! I excavated it ever so carefully with an old toothbrush, trying hard not to flake the mica-like layers off of the clumbly shell. It's been the pride and joy of my collection. However, my collection is overtaking the house. So, after enjoying my pretty shell for several years, I decided to donate it to the Delaware Museum of Natural History, which prides itself on its extensive mollusk collection, both fossilized and modern. The museum's fossilized shells are all kept in storage, while the colorful, modern ones are out on public display next to the Dinosaur hall. Go figure. However, they are planning a new permanent display of fossil shells. Here's hoping that this gets viewed down the road! Meanwhile, someone at the museum thinks that although Maryland Isognomons have always been identified as I. maxilllata, based on an Italian holotype, they are probably their own species. This specimen is intact enough to try to describe that new species. I can't wait to hear what happens as he works on this project!
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This was excavated from a block of matrix collected from submerged landslide material in the Chesapeake Bay. The common name of the shell is pronounced "gooey-duck." The height listed is the diameter of the opening between valves on the posterior side, where the siphon extended.
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Chesapectin nefrens is an index fossil for the Drum Cliff Member of the Choptank Formation. This example is particularly nice because the interior is almost completely layered in pearl.
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This piece was excavated out of a block of matrix deposited in the Chesapeake Bay by a landslide. The shell was partially exposed in the water. The dark side was still in the matrix while the light side was exposed to the water. The pock marks on the light side are from modern barnacles which I removed during preparation. L. heros is a species with variation in shape. It may have a taller or flatter spire and the overall shape may be more or less globular. This specimen was donated to the Delaware Museum of Natural History.
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Lunatia heros is a predatory snail that drilled holes in other mollusks' shells to eat the contents. One often finds hole that they left behind in the surrounding fossil shells. The shells of L. heros are variable, having more or less extended spirals, more or less globoular shape, etc. This specimen was donated to the Delaware Museum of Natural History.
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I erroneously identified this earlier as the similar Turritella plebia, until looking at one more reference! Mariacolpus octonaria is an index fossil for the Drum Cliff Member of the Choptank Formation. Donated to the Delaware Museum of Natural History
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Donated to the Delaware Museum of Natural History. According to L.W. Ward, 1998 ( Full Reference : L. W. Ward. 1998. Mollusks from the Lower Miocene Pollack Farm Site, Kenty County, Delaware: A preliminary analysis. Geology and paleontology of the lower Miocene Pollack Farm Fossil Site, Delaware [A. Miller/A. Hendy/A. Hendy] ) , the Genus was re-assigned from Fissuridae to Diodora.
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This specimen and dozens like it were collected from matrix material deposited in the waters of the Chesapeake Bay by a landslide. It is one of only a few species that consistently survived intact in the matrix samples I collected. Most specimens were single, unbroken valves, but several had both valves together and intact. A. tisphila is considered the most abundant find in the Choptank Formation. It is an index fossil for the Drum Cliff Member. This specimen was donated to the Delaware Museum of Natural History.
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Another common find near Matoaka Beach Cabins, this is an index fossil of the Drum Cliff Member of the Choptank Formation. This specimen was donated to the Delaware Museum of Natural History.
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Although I have collected this species from Choptank Formation matrix, this one was found on the beach. The red staining suggests it may have been from another formation as the Choptank sand at St Leonard is gray.
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Found at the Beach near Matoaka Cabins, E. marylandica is an index fossil of the Boston Cliffs Member of the Choptank Formation. The genus for this animal bounces back and forth between Marvacrassatella and Eucrassatella. WoRMS lists it as being re-assigned to the Eucrassatella genus. As of this update (November 8, 2017), the Eucrassatella genus has been restricted only to Indopacific species, so the genus was reverted to Marvacrassatella. This specimen was donated to the Delaware Museum of Natural History.
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Although there are oysters littering the beach, I would hesitate to call any one of them anything other than modern. The fossilized oysters of this type retained their colors remarkably well. This shell was excavated from a lump of matrix deposited in the Chesapeake Bay after a landslide. This specimen was donated to the Delaware Museum of Natural History.
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Spent a few hours at Flag Ponds Nature Park near Calvert Cliffs, Maryland and found a few shark teeth. I'd be grateful for any help identifying these last two teeth. The first looks a little meg-like but is very small (perhaps posterior??) and the second smaller tooth has very interesting notches on either side of the tooth - I thought this might be Bronze Whaler. Thoughts?
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This specimen and dozens like it were collected from matrix material deposited in the waters of the Chesapeake Bay by a landslide. It is one of only a few species that consistently survived intact in the matrix samples I collected. These are also common finds loose on the beach. This specimen was donated to the Delaware Museum of Natural History.
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This specimen and dozens like it were collected from matrix material deposited in the waters of the Chesapeake Bay by a landslide. It is one of only a few species that consistently survived intact in the matrix samples I collected. Most specimens were single, unbroken valves, but one did have both valves together and intact. This specimen was donated to the Delaware Museum of Natural History.
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Collected from a lump of matrix deposited in the Chesapeake Bay by landslide activity. It's one of only three I have been able to collect that were intact enough to identify. Donated to the Delaware Museum of Natural History.
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This specimen and dozens like it were collected from matrix material deposited in the waters of the Chesapeake Bay by a landslide. It is one of only a few species that consistently survived intact in the matrix samples I collected. Most specimens were single, unbroken valves, but several had both valves together and intact. This specimen was donated to the Delaware Museum of Natural History. Formerly known as Corbula inequalis.
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Ok experts.... Severely eroded (dolphin?) inner ear or funky looking stone/pebble from Calvert Cliffs, MD? I have a lot to learn... Thanks!
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Found this odd little bone at Calvert Cliffs. It is only 3/4" (0.75") long. Definitely fossil and doesn't appear to be fish.
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Last Monday, June 12th, was my first trip to the Calvert Cliffs, and while my haul is hardly breathtaking I was very happy with it since it was my first tooth-hunting trip ever (first pic). I did my best to try and i.d. the finds, but I'm probably off on some of them. In fact, looking at this again, I can see that the top middle one is probably the tooth of a Lemon Shark, not a Gray as I had labeled it a week ago. I didn't spend much time each time I stopped at a beach (I was kayaking from Brownie's Point), because I didn't know how much there was to see as I traveled south. Turns out, only that first run of cliffside beaches at low tide offered anything, but I spent most of the day paddling south past the rocky shore, wooden piers and private beaches. There were thunderstorms on Monday so I went yesterday, June 20th. This time I spent the entire time on those cliffside beaches at low tide. I'm pretty happy with what I found, though I'm sure it's pretty standard fare. As I was walking past one of the several landslides that spill out into the sea from the cliffs, I saw something sticking straight up out of one. It turned out to be half of a meg tooth (on the right, below)! I clawed around in the surrounding clay to see if the other half was anywhere to be found, but that search was as useless as I expected it to be. Looking down, I found what I think is a second partial meg tooth. I ended up finding a number of teeth visible on the surface of these landslides, but I didn't have any tools aside from a small hand trowel for scooping up stuff for sifting. I found some sort of bone in one of the landslides, and I *think* it's a partial cetacean ulna? Two other notable finds were what I think is a Shortfin Mako shark tooth and an Odontocete tooth- which, btw, I almost threw away. I didn't know what it was and it looked like something from a modern plant. It passed my completely silly squeeze test (it didn't fall apart like rotted plant matter), so I kept it. Well, now I know. So, are we allowed to dig around in those landslides? I know, aside from it being dangerous, that we're prohibited from touching the cliff face, but these landslides extend out from the cliff and most reach the waterline. Some of them seem pretty new, just based on vegetation -or absence thereof- on them. Anyway, I had a great day and I hope to return soon.
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Hello all! My son and I enjoy looking for shark teeth and fossils around the Chesapeake Bay. We found something new recently and I can't seem to ID. Thank you for any help you may be able to provide.
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