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Showing results for tags 'fossil fish teeth'.
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Micros from an unknown Cretaceous (?) Colorado formation.
Brett Breakin' Rocks posted a topic in Micro-paleontology
Hello Everyone, I picked up some Cretaceous fossil matrix (fossiliferous rocks) from an auction that our WIPS (Western Interior Paleontological Society) group held last year. I picked them up knowing I wanted to give them a nice Vinegar bath and pull out the teeth/fossils trapped in the matrix. So far it looks like it was a very vigorus marine environment. The teeth and fossils are fairly worn and broken. Lots of fishy bits and pieces. A few shark teeth, fish teeth etc... I'm going to share the finds as they drop out of the matrix. I pull the fossils out of the solution every day or so, and refresh the vinegar once or twice a week. I manipulate and move the fossils using a small paintbrush. With what I have so far being able to sit quite comfortably in a pencil eraser's footprint. 1) My question is, what are these round things ? They have bands of light/dark and they are water polished. They don't 'look' geological. But I'm not familiar with fossils/structures such as these. Average size is less than a mm. Maybe 0.5mm if I had to guess. I'm not familar with Ostracods .. but I thought they were more assymetrical in shape. See image below. These survived the Vinegar bath and I've probably noted 2 dozen of about the same size and shape. 2) The formation I am assuming is from Colorado? The member these fossil rocks belonged to was a long-time member here in Colorado. The fossils feel like they are lying in that Cretaceous timeframe and look familar to what I have seen before. Does anyone recognize this rock type/formation ? A selection of the finds so far: The Ptychodus is about 2mm Thanks, Brett- 29 replies
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