OregonFossil Posted January 6, 2021 Share Posted January 6, 2021 (edited) Need some ID help on this one. Eocene, Keasey Formation, and an inclusion or something inside a concretion. Size of the whole piece is 12 x 15 cm, weighs about 6 pounds. Image 1 - Mollusk on top of something that has included into the matrix #2 is a close up of the mollusk and surrounding area Closeup of the inclusion material More images to follow. Edited January 6, 2021 by OregonFossil Spelling Link to comment Share on other sites More sharing options...
OregonFossil Posted January 6, 2021 Author Share Posted January 6, 2021 Layer surrounding the inclusion: Another closeup of the inclusion: Interesting intersection of the outer layers and the inclusion: Anyone know what the inclusion is? I am thinking maybe a coral? Link to comment Share on other sites More sharing options...
Fossildude19 Posted January 6, 2021 Share Posted January 6, 2021 Looks like it is just part of the concretion, to me. Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 IPFOTM -- MAY - 2024 _________________________________________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
badeend Posted January 6, 2021 Share Posted January 6, 2021 Hello, I think it s a geological feature, not a fossil. greetings Walter “If you can't explain it to a six year old, you don't understand it yourself.” Link to comment Share on other sites More sharing options...
OregonFossil Posted January 13, 2021 Author Share Posted January 13, 2021 Here are two replies from PhD's: Rock ID from photos is tricky, but my best guess is a bivalve (the white area) surrounded by an "aureole" of mineral precipitation caused by original animals decay in the sediment. This is definitely a guess though! Very fascinating rock — it also looks like a concretion that has split in half. This looks like a partial shell or shells of some kind of bivalved mollusk in a concretion, which is not uncommon in the Keasey Formation. The surrounding textured material looks like dendrites and/or diagenetic minerals and/or is from later weathering, not fossil material. Fun find! Link to comment Share on other sites More sharing options...
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