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Showing results for tags 'kirkwood'.
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Hi all, Back again with a new ID request. Found a mammal bone in the surf of Asbury Park, NJ (USA); this area overlies and regularly exposes fossils from the Kirkwood formation which is known to have been a near-shore marine environment laid down during the early Miocene. The surf also occasionally reveals Pleistocene mammal bones as well as those of modern animals (have found bone bits and crab parts at various stages of fossilization for reference which makes it difficult to decide what's Neogene and what's Quaternary). My initial hunch was that this was a worn marine mammal rib and posted it to a local Facebook group with that in mind. It's very dense with minimal porosity (it was at the tide-line closest to the wave action where dense bone collects and was basically getting pulled back in by the coming high tide) which said dolphin or manatee bone to me. The responses I got were varied though. Some believed it to be a tooth due to an dark, enamel-like layer at the top of the 'top' of the specimen (it's 10cm or nearly 4 inches tall so that's a pretty big tooth). My assumption at that point was it might be Squalodon or some other odontocete from the Miocene. Another person believe it be specifically a incisor from the giant beaver Castoroides (based on the vertical striations) which would place it roughly Pleistocene in age. The final opinion, and the one that is prompting me to message here, confirmed my initial hunch that this is a rib fragment from a Miocene delphinid. I know that marine mammal fossils are relatively common on this forum and there are several experts that lurk around here... anyone have a clue? I've attached images of the specimen in question. It's ~10cm/~4in 'tall' and ~1.5cm/~0.6in 'wide' for reference. Sorry about the sand in the bone, it's basically impossible to get that out at this point. Will also take more pictures if needed.
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- castoroides
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Hi all. I wanted to share this chub tooth I found towards the end of 2021. From Monmouth, NJ, I think Kirkwood formation. One of my targeted species for the year and was able to find one in about 20 hrs worth of searching.
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- carcharocles
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Delphinodon dividium and others; my work in the New Jersey Kirkwood (Paleocene-Miocene)
frankh8147 posted a topic in Fossil Hunting Trips
Hello everyone! This trip report represents over a year and half of work (intermittent between my trips to the New Jersey Cretaceous) at a Kirkwood formation spot in New Jersey. I was happy to be invited by a few friends and had a great time digging outside of my normal streams! As you can probably tell from the title, I'm really highlighting one particular specimen - the Delphinodon dividium tooth. From all the research we have done; it appears to be the first appearance of this from New Jersey and the Northernmost occurrence in the eastern USA. I did have this looked at by professionals, and agree with the identifications. I also found a partial Squalodon tooth, a really nice and rare boxfish tooth, and a Galeocerdo Eaglesomi. I really like the Makos' too because they are both over 2 inches and are bigger than any I've ever found at Calvert (although I really haven't spent enough time there). Anyway, here are my finds (in order of mention).- 20 replies
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- delphinodon
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I haven't been collecting in a while as I've been really busy but yesterday I was free so I went to an Eocene/Miocene site in Nj. It was nice to be out collecting at my favorite site again and I did pretty well. I did pretty well quantity wise and I found some nice teeth like a couple nice makos. My father didn't find much because he only dug for a short amount of time but he did find a 1 1/4 inch chub. Unfortunately the only chub I found this trip is very beat up.