Is this a Crinoid?

mitziefisher off to a rocking start Member since December 2015 Posts: 11	Is this a Crinoid? Feb 9, 2016 9:37:29 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by mitziefisher on Feb 9, 2016 9:37:29 GMT -5 I found it in Rapid City, SD.

jakesrocks In Memoriam RIP Don Woodward AKA jakesrocks Member since April 2010 Posts: 12,696	Is this a Crinoid? Feb 9, 2016 11:03:38 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by jakesrocks on Feb 9, 2016 11:03:38 GMT -5 Nope. That's horn coral. Nice little specimen too. Are you from Rapid City ? I have good rockhound friends there.
	Last Edit: Feb 9, 2016 11:05:05 GMT -5 by jakesrocks Don --- USN Retired

Fossilman Cave Dweller Member since January 2009 Posts: 20,718	Is this a Crinoid? Feb 9, 2016 11:39:14 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Fossilman on Feb 9, 2016 11:39:14 GMT -5 As Don said,coral.....NICE!
	God,family and life.....

Fossilman Cave Dweller Member since January 2009 Posts: 20,718	Is this a Crinoid? Feb 9, 2016 11:42:59 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Fossilman on Feb 9, 2016 11:42:59 GMT -5 There are many species of crinoids,this photo is the most popular.....
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inyo
noticing nice landscape pebbles

Member since September 2014
Posts: 85

Is this a Crinoid? Feb 9, 2016 23:53:55 GMT -5

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Post by inyo on Feb 9, 2016 23:53:55 GMT -5

Since you say that the fossil came from Rapid City, to help learn the geologic age of your specimen check out the following sources for detailed geologic maps pertinent to your paleontological discovery:

1) Geologic map of the Rapid City East quadrangle: ngmdb.usgs.gov/Prodesc/proddesc_2285.htm ; mostly Mesozoic material in the Rapid Ciy East quadragle: Jurassic and Cretaceous, primarily. If the coral came from a proved Mesozoic rock unit, it would necessarily be a hexacoral.

2) Geologic map of the Rapid City West quadrangle (this is a pdf file, of course): www.sdgs.usd.edu/Pubs/PDF/GQ24K-01_20060814.pdf ; lots of Paleozoic formations exposed in the Rapid City West quadrangle: upper Cambrian to upper Permian; If the coral derives from a Paleozoic locality (though obviously younger than upper Cambrian), it would be a rugose solitary coral. Triassic-age Mesozoic Era rocks also occur in the Rapid City West Quandrangle--once again, if the coelenterate comes from such a source, it's a hexacoral.

Photographs of some solitary rugose corals I observed in the upper Mississippian Perdido Formation in Death Valley National Park a number of years ago: Death Valley Corals .

Last Edit: Feb 9, 2016 23:57:00 GMT -5 by inyo

mitziefisher
off to a rocking start

Member since December 2015
Posts: 11

Is this a Crinoid? Feb 11, 2016 9:21:18 GMT -5

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Post by mitziefisher on Feb 11, 2016 9:21:18 GMT -5

I guess the horn coral was not a bad find! Since, I found the horn coral and my first arrow head the first day! I am not from Rapid. I am from Ossipee NH, My Husbands family lives in Rapid Valley. I am trying moving there, hopefully at the end of the month. When I was out there I found my passion. I want to go to school to become something in the geology profession. I have been selling some of my rocks and fossils to make some extra money to move back there. I think I may have another piece that looks like horn coral. Now that I have seen some other ones. How ever, every time I think I have identified something it turns out to be something else. How small can the horn coral be?

Last Edit: Feb 11, 2016 9:28:11 GMT -5 by mitziefisher

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rocknrob: There was a shop in Portland, don't know if it's still there called Kenny and Zukes who made the absolute best pastrami sandwiches I have ever had. The problem is every restaurant thinks their sandwich is worth $20 now and seldom makes the grade. Nov 12, 2024 9:53:31 GMT -5

rocknrob: So, to end my thread on sandwiches. If you find your sandwich worthy of that price by all means keep going to that restaurant (chewie)