One Of My Favorite Fossils

[KLM]

Without knowing hardly anything about some of my pieces I have enjoyed collecting them over the years. This one was given to me so I don't know anything about its origins. It has these small shells all the way through it. It was around 3-4 inches thick but I had it cut in half to show better. Its one of my favorite pieces. It's very heavy for its size. Any ideas where it came from and how old it may be? Thanks very much!!

[Auspex]

This is (the incorrectly named) "Turritella Agate"; always nice to look at, and one of my favorites too

Here is a link to some good information: LINK

[Oxytropidoceras]

Some publications about "Turritella Agate" are:

Allmon, W. D., 2004. Into Focus. Googling Turritella, or

The Present and Future Value of the Web for Paleontological

Research. Palaeontologia Electronica. vol. 7, no. 2, 2E:9, 171KB;

http://palaeo-electronica.org/2004_2/editor/focus.htm

http://palaeo-electronica.org/2004_2/editor/focus.pdf

Allmon, W. D., 2005, Paleontology of “Turretella Agate”, A

Pleurocerid Gastropod-Dominated Assemblage from the Eocene

Green River Formation of Wyoming. Geological Society of

America Abstracts with Programs. vol. 37, no. 1, p. 19

https://gsa.confex.com/gsa/2005NE/finalprogram/abstract_83382.htm

Allmon, W. D., 2009, The Natural (and Not-So-Natural)

History of “Turritella Agate.” Rocks & Minerals. vol. 84,

pp. 160-165. http://www.rocksandminerals.org/Back%20Issues/2009/March-April%202009/Turritella

Allmon, W. D., nda, A Bibliography on "Turritella" agate,

Museum of the Earth. at http://www.priweb.org/Research/Turr%20Agate%20Biblio.htm

Allmon, W. D., ndb, "Turritella" Agate, Museum of the Earth.

at: http://www.priweb.org/Research/Turritella%20Agate.htm

Dolenc, A., 1979, Turritella agate- A new find in southwest

Wyoming. Lapidary Journal. vol. 33, no. 8, p. 1692.

Dolenc, A., 1981, Turritella agate: Update. Lapidary Journal.

vol. 34 , no. 11, pp. 2484-85.

Grande, L. 1984. Paleontology of the Green River Formation,

with a review of the fish fauna. Bulletin no. 63. Geological

Survey of Wyoming, Laramie, Wyoming. 333 pp.

http://www.wsgs.uwyo.edu/public-info/onlinepubs/docs/B-63.pdf

http://www.wsgs.uwyo.edu/public-info/onlinepubs/Bulletins.aspx

Spendlove, E., 1977, Wyoming Turritella agate-Field trip:

It's in the Delaney Rim south of Wamsutter. Rock & Gem.

vol. 7, no. 6, pp. 52-55.

Other citations are at https://www.museumoftheearth.org/research.php?page=pubs_all

Yours,

Paul H.

Edited April 18, 2014 by Oxytropidoceras

[RyanNREMTP]

Some?

[Wrangellian]

Some?

[KLM]

Thanks for the information!! Sorry for the late post its been a busy summer.

[jpc]

In case you did not check out the links, it is Eocene, from Wyoming.