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Calvert County, MD beaches, Matoaka Lodges, Miocene diversity, September 2020
Chris Carpenter posted a topic in Fossil Hunting Trips
Here is a brief report from one of our latest forays into Calvert County, MD. The well-known stretch of shoreline along the western Chesapeake Bay is loaded with Miocene fossils, with the Calvert, St. Mary's, and Choptank formations progressively exposed along a ~24 mile stretch of beach and cliffs. We found an Airbnb in Lusby, MD which was not too far from Matoaka Lodges, which seemed the best bet since the nearly 2 mile walk to the beaches at Calvert Cliffs State Park is impractical for our family at this time. Covid-19 and Maryland's onerous private land regulations can make it -
From the album: Calvert Cliffs
Look what washed up on the beach! Scratches on it may be tooth marks. Found on Matoaka Beach, Calvert County, Maryland- 1 comment
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From the album: Calvert Cliffs
Can you believe I found this just sitting there, sticking out of a block of landslide material on the beach and wiggled it out with a screw driver? Never found even a suggestion of one before and this is only one of two I found in three days of carving through that block to discover the rest of its treasures. The other, sadly, is not in as good a shape, but still a treasure! Found at Matoaka Beach, St Leonard, Maryland.- 2 comments
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Shell Collage Excavated from Drum Cliff Member Matrix, Calvert County, Maryland
I_gotta_rock posted a gallery image in Members Gallery
From the album: Calvert Cliffs
Carefully exposed all of these with a dental pick from the lump of matrix in which they were encased. Nothing got moved, just glued insitu. top: Scaphella virginiana center left: Mariacolpus octonaria center right: Ecphora megane bottom left: arcadae indet. sp. bottom right: Glossus sp.- 6 comments
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From the album: Calvert Cliffs
Whelk, Siphonal devexa Aperture view Middle Miocene St. Leonard, Maryland Choptank Formation Drum Cliff Member This is one of four I found in the fallen matrix in four days of excavation. It is the only one that I found intact.© Heather JM Siple 2018
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From the album: Calvert Cliffs
Whelk, Siphonal devexa Aperture view Middle Miocene St. Leonard, Maryland Choptank Formation Drum Cliff Member This is one of four found in the fallen matrix in four days of excavation. It is the only one that was found intact.© Heather JM Siple 2018
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From the album: Calvert Cliffs
Snail, Siphonalia devexa Middle Miocene St Leonard, Maryland Choptank Formation Drum Cliff Member Excavated from landslide material NW of Matoaka beach access in St Leonard, Maryland© Heather JM Siple 2018
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From the album: Calvert Cliffs
Mussel Shells, Perna condensa Middle Miocene Choptank Formation Excavated from matrix submerged in the Chesapeake Bay, about 10 feet off of the beach at St. Leonard, MD, at low tide. Internal molds from a Miocene mussel bed, left in fine clay and stabilized with Paleobond to prevent disintegration© Heather JM Siple 2018
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Excavated from matrix in the Chesapeake Bay, about 10 feet off of the beach at low tide. View is external on both valves, but hard outer coating has been lost to decay. Valves are pearlescent.
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This specimen shows the original sheen and probably original coloration of the shell. It popped out of the matrix as you see it and required almost not cleaning. This specimen was stabilized, but stabilization did not change the appearance at all. Excavated from a chunk of matrix fallen from the cliffs into the Chesapeake Bay. Donated to the Delaware Museum of Natural History.
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This specimen was made incredibly soft by the surrounding matrix. The thin veneer of glossy coloration has worn away, but can be seen on this specimen, which came from the same 2 ft x 1ft x 1ft block of matrix that fell out of the cliff into the bay. Half a dozen of these were collected from that and one other small, adjacent block that day, along with more than two dozen other species. Layer originally designated Shattuck Zone 18. Donated to the Delaware Museum of Natural History.
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Sometimes you just get lucky. This geoduck (pronounced gooey-duck) was sitting with its mate in living state, filled with matrix, under a pile of landslide rubble at the water's edge. The exteriors of both shells were almost completely clean of matrix. Most other specimens were badly cracked in the matrix and would never have survived the fall. This shell was donated to the Delaware Museum of Natural History.
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From the album: Calvert Cliffs
A recent landslide revealed an ancient bed of these paper-thin shells, all in pairs. They lived buried well into the sand and extended long necks up to the water to feed. Consequently, the shells did not get moved, just filled in and stayed in pairs after the animals died. They can be extracted mostly whole with some great care.-
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Collected on the beach. Donated to the Delaware Museum of Natural History.
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Collected from landslide material in the bay. Donated to the Delaware Museum of Natural History.
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Collected in landslide material in the Chesapeake Bay. Donated to the Delaware Museum of Natural History.
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Due to the extremely fragile nature of this specimen, and the species in general, I was loathe to clear out any more of the matrix from the interior of the shell, so bits and pieces of other shells are present. The large central piece is the inner "cup," which attaches to the "saucer" at only a very small point in the tip. Collected from landslide material in the bay. Donated to the Delaware Museum of Natural History.
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Collected from matrix from Shattuck Zone 17 that washed into the Chesapeake Bay by landslide. Donated to the Delaware Museum of Natural History.
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This is a particularly fragile type of shell, made of many fine layers, and is prone to disintegrate as these did. This rare steinkern was found on a block of matrix submerged in the Chesapeake Bay. Dimensions are for the best-exposed steinkern on the block. The entire block is 14 cm wide x 10 cm high x 5 cm deep.
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Well I managed to lure the wife into another beach excursion. The only stipulation was that I was in charge of cooking barbecue dinner. We packed up the car and drove 90 minutes to our destination with a four month old. My daughter was good for the most part but she had her moments. Here's the trip in a nutshell. Mrs Fossil-Hound with baby and I at the top of the cliffs. The drive was certainly worth it. The beach office had a custom Miocene Shark Tooth display with a lot of large teeth. A box of free shark teet
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