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Showing results for tags 'jack county'.
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Tiny bryozoan-like pattern Pennsylvanian find - Texas - (New Photos)
BobWill posted a topic in Fossil ID
This is from the Finis Shale in the Pennsylvanian, Graham Formation at Jack County, Texas. It had no visible features except for a rectangular patch of a different color from the matrix until I magnified it. The images are using an inexpensive usb microscope set to 250x so not great resolution but it's all I have. It looks like the grid pattern you see on some fenestrate bryozpoas but these are just way too small. The closest image has a total height of about 1 mm.- 11 replies
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I found this at the Lost Creek Dam site at Jacksboro Texas. It is the Finis Shale Member of the Graham Formatoion in the Upper Pennsylvanian Sub-period. I don't often find the apical end of any nautiloids so I was thinking it could help with the ID. There is a dark spot on the oral end that may or may not be the siphuncle, it is not clear. I thought it may be a Bactrites but it would be one without the hemispherical apex and constriction you see on some. It also has a cameral ratio higher than some Bartrites at around 3. I don't know what the black dots are.
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Large Worthenias from Lost Creek Reservoir Borrow Pit, Near Jacksboro, Texas
gwestbrook posted a topic in Fossil Hunting Trips
I had forgotten I had found Worthenia fossils of this size at the Jacksboro Pennsylvanian period Finis Shale site. Found these probably on my first or second collecting trip to that site 5 or 6 years ago. I have boxes of stuff I haven't looked in for years. Finding stuff that's surprising me.- 20 replies
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Pennsylvanian, Finis Shale Fossils, Lost Creek Reservoir Borrow Pit, near Jacksboro, Texas
gwestbrook posted a topic in Fossil Hunting Trips
Another grouping of fossils from the Pennsylvanian Finis Shale Site near Jacksboro, Texas. Always something to find there.- 26 replies
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