the public fossil   collection

Fossil specimens donated by Loyce Youngblood to the

 Laurence Youngblood Energy Library

 University of Oklahoma

Large Ammonite Fossil   (Coahuila, Mexico)

   Large Sabal Palm Frond        (Wyoming)

Energy Library Fossils:

Energy Library Minerals:

Youngblood - Library Story

       

   Youngblood Library Link     (Oklahoma. University Libraries System)

Crinoid "Sea Lily"...    Youngblood Energy Library fossils 

     

   Crinoid - "Sea Lily"    

 

 

Purchased from Youngblood Estate by the University of Oklahoma for display at the Youngblood Energy Library

 


CRINOID - Echinodermata: marine animal (Germany)

Location: Holzmaden, Baden-Württemberg, Germany (S. E. of Stuttgart).

Geologic Period Range: Ordovician to present. Traditionally estimated at 500 million years Before Common Era (BCE) to present.1

Age of Specimen: Lower Jurassic Period. Estimated from 172 to 180 million years BCE.1

Description: Crinoids of the class crinoidea are in the phylum Echinodermata, which includes such radially symmetrical marine animals as sea urchins,  starfish, and brittle stars. Crinoids are popularly called "sea lilies" due to their body's bulbous lily-like shape. These marine, invertebrate animals are found still living today, generally as individuals. They are usually bound to the sea floor by a stalk opposite their mouth, and appear in a variety of beautiful colors, thereby  presenting a flower-like appearance. Crinoid fossils are sometimes golden-hued from absorption of iron pyrites ('"fools gold"), as in this specimen, thereby giving the appearance of a golden lily.

This Crinoid is of the species Seirocrinus subangularis, and it is of the family Pentacrinitidae. It is characterized by a globular body enclosed by a small calyx, from which freely moving "arms" extended upward to gather the marine animal's food. At the bottom of the jointed, flexible stem, but missing from this specimen, was a "root-like structure" by which it was attached to the sea bottom or sea floor plant material, and, occasionally, to driftwood.  Specimens of this species have very long stems, tapering toward the top, up to 65 feet (18 meters) in length.

This 3 1/2 foot (1-meter) single-calyx crinoid is very well-preserved in a smooth, dark matrix consisting of fine-grained silts and clays which eventually formed bituminous (pitch-like) Poisidonia Shale, providing contrast to the golden-hued calyx-protected globular body. Some of the shale around the specimen has been removed in order to better display the crinoid, The shale matrix also contains small pelecypoda (clams) and Posidonia bronni. This specimen was quarried in an area of Germany containing a large concentrated volume of crinoids with exceptional preservation, most likely suggesting a rapid burial, probably by catastrophic mud deposition, perhaps triggered by one or more tectonic events.

1 Estimated by traditional Uniformitarian concepts (gradual, uniform changes over great periods of time, similar to the rates of change observed today).

To compare, return to: Private Youngblood Crinoids  on page 4.

Return to: Fossils - O.U. thumbnails and links to Library fossils on page 3.

Next: "Prize" Ammonite - O.U. on Page 11

    David Wallace, P.O. Box 23901, Oklahoma City, OK 73123 (405) 974--9759  davidwallace333@att.net    Copyright © 2009 David Wallace, All Rights Reserved 

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the private fossil collection

Personal fossils from the  residence and estate of  

Loyce Youngblood

Large Sabal Palm Frond overlaying apparent fish  Green River Formation (Wyoming)

 Multiple-Calyx Crinoid   with nine "Sea Lilies"  (Germany)

Single-Calyx Crinoid   "Sea Lily" marine animal    (Purchased from Estate by OU) (Germany)

      Loyce and Laurence:      The Youngblood Story

INDEX - Pages 

For information contact:     David Wallace    davidwallace333@att.net      (405) 974-9759