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)

   Cephalopod Slab...  Youngblood Library Fossils       

                                           CEPHALOPOD SLAB                   (Ammonites with straight nautiloids)

Large 6 foot (76"x 40") Cephalopod slab                

Well-preserved cephalopod slab featuring an unusually dense concentration of ammonites and straight nautiloids (rarely associated with ammonites).

Donated by Loyce Youngblood


Location: Desert area near border of S.E. Morocco and S.W. Algeria

Geologic Period Range:

Subclass Ammonoidea ("ammonite") Devonian to Cretaceous Periods, are traditionally estimated 408 to 63 million years B.C.E.1

Subclass Nautiloidea ("nautiloid") Cambrian to present, traditionally estimated 600 million years until present.1

Age of the Specimen: Late Devonian, estimated 375 to 355 million years.1

Description: This large 76' x 40" (1.9 meter by 1 meter) vertical slab contains an unusually dense concentration of highly-preserved marine ammonites (genus Manticoceras), as well as both coiled nautiloids and relatively-rare straight nautiloids, which are seldom found in conjunction with these ammonites, which are of the genus used worldwide as an "index fossil" to estimate the date of other fossils contained in the same strata of Late Devonian rocks. Moreover, these fossils are individually prized for ornamentation, so collectors and natives have long searched their known source (the northwest African desert), removing individual specimens from any slabs uncovered by desert winds.  All of these factors increase the rarity of this large, undisturbed, high-quality fossils slab.

This dense concentration of extremely well-preserved marine fossils deposited deep in the desert suggests catastrophic and immediate burial by one or more water-mud oceanic tsunami events, rather than indicative of gradual burial by sediments in an inland sea bed.

1 Estimated by traditional Uniformitarian geological concepts (gradual, uniform changes over great periods of time, commonly believed to be at a rate of change similar to that observed today).

Also see: Ammonite - "Prize"    Return to: Ammonite - Large (Page 7).

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

 

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