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Hello again my good friends. I did a petrographic thin section in a marine consolidated sediment, and i found some elements that seems to be microfossils. It is worth noting that these sediments are in a mandatory-way marine since in all of them are marine bivalves fragments. I also was unsure if put this here or either in the microfossil zone of the forum, leaving it here because it is an ID question. For each I'll leave a views in PPL and XPL. Hopefully someone may be able to recognize them at least broadly, and tell apart them from being forams, big diatoms or even algae. Greetings from Chile !!!!! PD: Sediment age may range from middle Eocene into the Miocene Fossil 1: Fossil 2: Fossil 3:
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Hi! I’m still trying to identify one fossil from a particular unit of Pleistocene/Early Holocene lacustrine silt from my hometown of Saskatoon, but I figured I would look away from it for a bit to try and identify another fossil from the same unit I’ve been unable to classify. I have two specimens, both apparently of the same species. They are both approximately 0.5 millimetres across. They are perfectly circular, with lines radiating from the centre and rings of alternating colours (possibly representing growth lines). One specimen is photographed dorsally, showing its circular shape, the other in profile, showing its umbrella-like, protruding outline. All photos are taken through a microscope with my best camera currently available, an iPhone! My main areas of middling expertise are arthropod and vertebrate fossils, so I have no idea what this is! I have briefly studied fossil foraminifera and diatoms in the past, but it looks like nothing I’ve seen in those areas as well. It reminded me of a small limpet, some type of seed or spore, or perhaps even a strange fish scale, but I have no formal suggestions. I’d highly appreciate any help! I will try to supply any additional information you may need. Thank you!
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Location: Eocene, Keasey Formation NW Oregon. Length: 567 nm I've been using the following resources: 1. Microfossils by Armstrong & Brasier, second edition 2. ANSP Diatom New Taxon File 3. JSTOR research data base The item of interest is center image (5 mpx file), lighted bt 5600K sidelight, 10X objective. I have a sample gastropod encased in Keasey mudstone (formation can be from 1000 to > 10,000 feet in depth), and thought I'd scape a tiny bit of the the mudstone on a slide to view under my compound scope (use for solid specimens with a LED video light to the side). The item of interest is the clear, tubular item (clear) in the left upper center. It measured 567 nm in length and I guess for width (didn't measure) is around 40 -50 nm. There is the clear funnel shaped item directly above near the edge of the image which might be the top to this item. I've spent about 4 hours trying to id the item and believe it is a Nano-Fossil of some type. Placed this inquiry here because it's a "what is it" and not an ID Micro/Nano fossil for the microfossil forum. Any guesses before I go insane would be greatly appreciated.
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