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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
Diplurus newarki - partial coelacanth Late Triassic, Newark Supergroup, Newark Basin, Lockatong Formation, North Bergen, NJ, old Granton Quarry G-3 layer.- 8 comments
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Last month my dad and I ventured to the site of the former Granton Quarry in hopes of adding some nice Late Triassic fossils to my collection. We only stayed for an hour and a half because there isn't much there anymore. Much of the fossiliferous layer has been carved out by collectors. One spot looked as if someone just scooped out all of the rock. We were quite fortunate to find a spot that had been missed or had only recently been exposed. We came close on two occasions to finding a complete Diplurus newarki, but no luck this time around. That will just have to wait until our next trip! Here are some of my favorite finds: Some conchostracans (Estheria ovata) Several plates just covered in assorted bones and scales - I love the white/blue hue to these! First of the shamers. This fish is potentially complete, but when I tried to remove the last chip to see how well preserved the head is, the rock began to separate, so I just left it as is. For what it is worth, it is two-thirds of a Diplurus newarki, and two-thirds of a coelacanth is better than none! Here is the other one. This piece split off unevenly from a larger block - as often happens at Granton Quarry - exposing two heads of Diplurus newarki. One of the heads is incredibly well preserved and was likely part of a complete fish that was broken in half when the rock split. It is still a pretty cool find!
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
Another partial coelacanth, Diplurus newarki. Front half of fish including complete skull and first dorsal on bottom, with partial lower skull in the upper right. Late Triassic, Newark Supergroup, Newark Basin, Lockatong Formation, North Bergen, New Jersey. Old Granton Quarry. Scale is in CM.© 2019 T. Jones
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Does anyone know the Moh's Scale hardness for the shale/slate from the Granton Quarry? I have a prep that is going to require abrasive for the whole thing. The matrix just laughs at soda, so I'm on the hunt.
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
2 skulls of the Late Triassic coelacanth, Diplurus newarki. The larger of the two shows the front half of the fish, overlapping the body of a smaller coelacanth's body. from the Late Triassic, Lockatong Formation. Newark Basin, Newark Supergroup. Old Granton Quarry, North Bergen, NJ. The two fishes outlined in red:-
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
Skull of Diplurus newarki coelacanth. Late Triassic, Newark Supergroup, Newark Basin, Lockatong Formation North Bergen, NJ. "Granton Quarry"© 2017 Tim Jones
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
Caudal fin of Diplurus newarki coelacanth. Late Triassic, Newark Supergroup, Newark Basin, Lockatong Formation North Bergen, NJ. "Granton Quarry"© 2017 Tim Jones
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
Another skull and dorsal of a Diplurus newarki. This one is not quite as well preserved as some of my other examples. Late Triassic, Lockatong Formation, Newark Supergroup, North Bergen, New Jersey, Granton Quarry.© © 2016 Tim Jones
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
Diplurus newarki coelacanth, The skull is present, if poorly preserved, as is the 1st dorsal fin. Late Triassic, Lockatong formation, Newark Supergroup North Bergen, New Jersey.© © 2015 Tim Jones
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In the early 1960s, I collected Triassic fossils from Granton Quarry in North Bergen NJ. This was a phenomenal Triassic site, producing many fish fossils plus rare reptiles such as the gliding Icarosaurus. Back then, I found several complete fish. But one piece remained a mystery for 50+ years. It is a roughly 3-inch cigar-shaped lump in a 7 X 5 inch piece of very hard, black shale. I always thought there was a fossil inside the lump, but the tough shale cover stymied me. Three years ago I took the piece to the North Carolina Museum of Natural Sciences and had the staff paleontologist (a Triassic specialist) look at it. He blasted it with dolomite for a few minutes, but this didn't cut the shale surface. He gave the piece back, telling me it was likely a coprolite or concretion and not worth the effort to reveal what was under the surface. Fast forward: A week ago, I bought a Makita wet stone grinder & polisher to shape and polish agatized wood. It's a tool designed for granite and marble fabricators, but used by petrified wood enthusiasts. I couldn't resist using it on my Granton piece, and the diamond pads cut right through the surface. Inside the "lump" is a vertebrate -- maybe a fish, but I can't ID it. The tiny bones are replaced by light blue silica, and they almost look opalized. All photos were taken through a microscope, and these are some examples. First photo: the fossil has no head, but these look like vertebrae that are near the head (field of view is just under one-half inch, and violet is a light reflection off the surface). Behind these vertebrae are scattered bones and scales(?), followed by more interesting structures seen in the next photos. Second and third photos: very thin bones and scales (?) that trail off and eventually disappear.
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