Jlark18 Posted May 5 Share Posted May 5 Found this specimen in a dry riverbed near Holden Utah. There are many circular and oval like depressions throughout. Looks similar to pine cone shape and indentations or stigmaria roots. Any thoughts? Cheers. Appx. 3.5” x 4.5” @ 1.5lb Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 5 Share Posted May 5 Not Stigmaria. Looks more like some sort of a cycad fossil. Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "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...
Mark Kmiecik Posted May 5 Share Posted May 5 I would expect a more regular pattern in a cycad, stigmaria or cone. I think it may be geological -- or maybe not. Mark. Fossil hunting is easy -- they don't run away when you shoot at them! Link to comment Share on other sites More sharing options...
paleoflor Posted May 5 Share Posted May 5 Could this be a river-worn piece of vuggy limestone? What's the geology like around Holden (UT), e.g., in terms of age and depositional environment? Searching for green in the dark grey. Link to comment Share on other sites More sharing options...
Rockwood Posted May 5 Share Posted May 5 Could it be pholad borings (or the like) from when it was still soft ground, that were load compressed before lithification? Link to comment Share on other sites More sharing options...
Jlark18 Posted May 5 Author Share Posted May 5 5 hours ago, Fossildude19 said: Not Stigmaria. Looks more like some sort of a cycad fossil. I am not familiar with cycad’s but after looking it up the images online look almost identical. Link to comment Share on other sites More sharing options...
Jlark18 Posted May 5 Author Share Posted May 5 3 hours ago, Rockwood said: Could it be pholad borings (or the like) from when it was still soft ground, that were load compressed before lithification? Hmm..is it typical for these borings to be uniform in shape and size and to be located across the entire exterior? Link to comment Share on other sites More sharing options...
Rockwood Posted May 6 Share Posted May 6 1 hour ago, Jlark18 said: Hmm..is it typical for these borings to be uniform in shape and size and to be located across the entire exterior? No. But that's precisely why I suggested it. I don't think these are. Link to comment Share on other sites More sharing options...
New Members vintorez1 Posted May 8 New Members Share Posted May 8 Not stigmaria or cycad for sure. I have collected both from Utah. Superficially it looks like specimens of Tempskya I have collected. The area around Holden is alluvial fans with the Fishlake National Forest mountains nearby and those are full of quartzite, dolomite, and limestone from the Ordovician and earlier. I would venture to guess it was found in the Pliocene Oak City Formation that directly surrounds parts of Holden. From the description "Sandy, bouldery gravel, poorly to well cemented; forms dissected alluvial apron on west and south-west sides of Canyon-Pahvant-Range fault block; base not exposed; contains landslide blocks (-Cop and Tf at Red Cedar Hill, 7 miles (11 km) south of Holden, and Tqb and Tcb in the hills south of Oak City); estimated thickness 0 to 2,000 feet (0-600 m)" Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now