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Made two trips to the creek while worrying about Dorian; one trip to the beach, but not much there (picked clean by Labor Day visitors? Only one olive shell and a few bleached, worn small teeth.) I pooled the stuff collected in trips from the same general area in the creek. One of the trips I used a slightly coarser screen, followed by a window screen in response to @MarcoSr excellent recent post "What are you missing????". Since my teeth are micro-sized to begin with, I was sure that there would be lots of new stuff to sort through. Unfortunately, I was disappointed in my initial characterization of the "fines". I cannot see well looking about in the creek, but am very near-sighted and think I can see most of what is there at home (but will retry with a different substrate spot; the spot I was digging was fine gravel and shell bits). I do see more smaller drum teeth. Some bone bits and a few angel shark teeth (may have damaged the roots on them as well with the double screening, always wondered if screening was why my cowshark teeth were often rootless?) No nurse shark or cookie-cutter shark teeth yet, but still intrigued. The two trips were mostly sand tiger teeth, mostly rootless or small root spikes. Some were glossy and nice but I'm guessing the gravel takes its toll. A couple of verts, a small piece of a bonito nose(?), a bunch of angel shark teeth (a few with broken triangular bases; I stood them up for the scan). A bunch of drum teeth (and small round rocks, not shown). One ugly worn cowshark tooth. One for sure small mako, and a few that I cannot see any serrations on (micro mako teeth?) More serrated triangular teeth than usual for me, mostly gray sharks, but one worn-on-the-tip hemipristis. Two tooth pieces, one relatively flat with what looks like hemi-serated edge of enamel, and one heavier, triangular edge with finer serrations that I think, hopefully, is a smallish megalodon. If so, this is the first meg that I have seen from the creek since a kid found a big one thirty years ago there (teeth were much more plentiful, but meg teeth were always rare there).
Went out hoping recent rains would have washed out some teeth. Mostly washed away the angel teeth and drum esophageal teeth I've been finding (a few of each). Usual sand shark spikes and more vertebrae than usual (gravelly?) Finally found a weird pinkish white banded mako, or rather great white, slant length 2". Seemed a good time to quit.
I am a constructor, I have no knowledge on fossils or bones, so please excuse me if my found is a common thing. During an excavation, buried less than a meter deep in the ground, I casually found this piece among the debris, looked for other samples nearby but there was nothing else. All I can say is that it is not old. Can someone please help me figure out what is this? None of my coworkers could recognize this. I must say that this was found on Bolivia, my country have no seashore. Thank you very much!