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Last Friday I went with a group of people to a local North Carolina Oligocene Quarry. This quarry contains exposures of the late Oligocene Belgrade Formation; Pollocksville and Haywood Creek members along with the early Oligocene river Bend Formation. These are all in situ pictures. The drive in .... These piles are mostly Pollocksville member, but there is some Haywood Creek member of the Belgrade mixed in. There is also a pebble lag that has Pleistocene and Pliocene fossils. First find of the day was this nice little croc tooth, Thecachampsa sp. A little later I found this nice cowshark tooth, Notorhynchus cf. primigenius and this nice little croc vert .....
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These little echinoids, referred to locally sometimes as "cheerios" because they average about the same size as one. They are a relatively common find in the basal sands of the early Oligocene River Bend Formation, often in association with Rebecapecten trentensis. This specimen is one of my smaller ones; 6.1 mm in diameter and is cleaner than most. Many of these have a calcite coating with black and white sand granules on them. In the last photo; the group shot, it is the one on the upper left. The smallest in the case. Reference: Kier, P.M. (1997) Smithsonian Contributions To Paleobiology : Number 83, Oligocene Echinoids of North Carolina. Pgs. 5-6, plate 3 figs. 1-4 and plate 4 figs. 1-5