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MarcoSr posted a topic in Fossil Hunting TripsThese micros came from Eocene, Orangeburg Formation matrix from the LaFarge Quarry in Harleyville, South Carolina. This matrix was given to me by Larry Martin years ago and I just recently had the time to finish searching it. The matrix was very fine, what fell through a 1.5 mm sieve. It was very time consuming to search the matrix because of the small size. I usually only sample matrix this fine but looked through all I was given because it contained both oral and rostral sawshark specimens. I found 14 oral and 6 rostral sawshark teeth (Pristiophorus sp.). One oral (1 mm) and two rostral teeth (2 mm & 3mm)are shown below. Sawshark teeth are very rare from the East Coast of the United States. (Note these are sawshark not sawfish) I found a good number of Mustelus sp. (1 mm). Mustelus are actually pretty common, especially in a lot of Miocene formations, but aren’t collected very often because of their small size. I found a single Dasyatis sp. (1 mm) A nice Heterodontus juvenile anterior tooth (1 mm) Lots of catshark teeth (1 mm – 1.5 mm) Lots of different fish teeth (Note the fish teeth are in a 1 inch diameter gem jar) Lots of placoid scales (less than 1 mm) and a few ray dermal denticles (1 mm). Placoid scale Dermal Denticle Marco Sr.
Finally back from Singapore, so decided to brave (the much cooler) weather. Been away for three months and seemed to be a fair amount of collecting while I was away, hope they did well. I hunted hard for an hour or so with nothing but shells (which I don't usually pick up, but better than nothing!) Found a spot which produced maybe 75 small teeth (two angel shark, a broken cow shark, and teeth with very few cusplets, maybe washed more in millennial tides than those I usually find?) and a few interesting things that maybe I should post on the ID request section (?). Good to get my clothes muddy and my feet wet again. Will take a while (had just acclimated to Singapore) but don't notice much when digging / hunting. The first photo is most of the stuff collected. "2-3-18-teeth" shows the two angel shark teeth, some typical tiny teeth, and two things I cannot identify. "teeth 2 and 3" is a weird concave piece, have no idea what it could be(?), never noticed anything similar. "teeth 4" is a small oval piece with radial striations on the more flat side; two others are shown but the scanner couldn't capture the striations. Whatever it is it's fairly common. Thanks for any help. I think I'll try to get the bone ID'ed in the other section (will need to get better photos). 2-3-18-sharkteeth2.pdf 2-3-18-teeth3.pdf 2-3-18-teeth2.pdf 2-3-18-teeth.pdf 2-3-18-teeth4.pdf
I want to thank Alexandre @Quriosity for matrix from the Miocene of France (Miocene, Langhian Age, lower "dark" horizon, Loupian Quarry, France) and the Cretaceous of the Congo (Cretaceous, Maastrichtian,Tchivoula Quarry, near Hinda, Congo). The matrix was very fine. It was processed and ready to search. I spent almost a year and a half almost exclusively with the terrestrial Eocene/Oligocene matrix from my sons' ranch in Nebraska. It was nice to get back to marine matrix especially from two sites that I hadn't searched before. In the Miocene matrix from France (This was a very small sample size of a very fine matrix) I found a number of bony fish teeth, 7 Dasyatis teeth, 3 shark teeth, and two dermal denticles. Here is a picture of everything in a 1.75” diameter gem jar cup. Here are pictures of the 3 shark teeth. They are pretty small around .4 to .5 mm. Here is a picture of one of the Dasyatis teeth which were all under 1 mm. In the Cretaceous matrix from the Congo I found a good number of bony fish teeth, a good number of ray and sawfish teeth, and at least one shark tooth. Because of the matrix size I really didn’t expect to find shark teeth. I did recognize a number of species from the Maastrichtian of Morocco. However I did find several species that looked different. At some point I’ll take a lot more pictures of the ray and sawfish teeth. Here is a picture of the bony fish teeth in a 1.75” diameter gem jar cup. Here is a picture of the ray and sawfish teeth in a 1.75” diameter gem jar cup. Here is a picture of the shark tooth and a few odd specimens in a 1.75” diameter gem jar cup. Here is a picture of the 2 mm shark tooth. I’m not sure if this is a shark tooth with a damaged root or maybe a ray tooth, something like Cretomanta. Marco Sr.
Returned to the US after six months and headed to some favored spots for shark tooth hunting. Unfortunately everything was silted/sanded over. While I picked up some "whale bone" unearthed and left behind by others, shark teeth were in short supply and very small. Are these small teeth just small specimens of the larger ones, or are some different species? The serrations unfortunately don't show up well on my scanned pictures.