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.