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Re: Holzmaden Formation?

the official lithostratigraphic scheme for the German Jurassic is not yet released, however a draft is published here:


The Holzmaden beds belong to the Posidonienschiefer Formation. Previous schemes are dating back to the 19th century and are highly overfraught with local synonyms and homonyms (hence the "official release"). The term "Formation" was not used in the old names.

Posidonienschiefer means "Posidonia shale" (although the bivalve "Posidonia bronni" is now known under various names, including Steinmannia bronni or Bositra parva - don't know which one is presently en vogue).

Jahn Hornung

Thomas R. Holtz, Jr. schrieb:
From: owner-DINOSAUR@usc.edu [mailto:owner-DINOSAUR@usc.edu] On Behalf Of Dawid Mazurek

I always thought it was Posidonia Shale Formation.


When someone says a fossil originated from Holzmaden, what geologic formation would that be? It's weird how they no one ever
seems to specify.
The obvious guess would be that they're referring to a "Holzmaden Formation" named after the town, but Googling that brings
up a mere 58
results, with one of the top 5 being about the Pseudoscience Which Must Not be Named. That number sounds suspiciously small for such a well-publicized fossil site, so I'm having doubts. What *is* the formation of origin for "Holzmaden" fossils?

Thomas R. Holtz, Jr.
Email: tholtz@umd.edu Phone: 301-405-4084
Office: Centreville 1216 Senior Lecturer, Vertebrate Paleontology
Dept. of Geology, University of Maryland
Fax: 301-314-9661

Faculty Director, Earth, Life & Time Program, College Park Scholars
Faculty Director, Science & Global Change Program, College Park Scholars
Fax: 301-405-0796

Mailing Address: Thomas R. Holtz, Jr.
Department of Geology
Building 237, Room 1117
University of Maryland
College Park, MD 20742 USA