The Buckhorn Asphalt deposit – An unique fossil Lagerstätte from the Pennsylvanian of Oklahoma

Conference contribution
(Abstract of lecture)


Publication Details

Author(s): Seuß B, Nützel A, Mapes RH, Yancey TE
Publication year: 2008
Language: English


Abstract

The Pennsylvanian Buckhorn
Asphalt in Southern Oklahoma contains the best-preserved Palaeozoic
mollusc fauna in the world. Early impregnation of mixed
carbonatic-siliciclastic rocks (mudstones, pack- to grainstones, shell
beds, and conglomerates,) with hydrocarbons prevented aragonite
destruction (“Impregnation Fossil Lagerstätte”). Exceptional
preservation comprises shell microstructures, microornaments and early
ontogenetic shells. Most gastropods had planktotrophic larval
development indicating a high primary production although the remains of
phytoplankton are very rare in Late Palaeozoic deposits. The deposition
of the Buckhorn sediments occurred close to a coastal area partly
involving mass flow processes (density currents) triggered by storms.
Shells of benthic molluscs yield the most diverse known Palaeozoic
microboring assemblage, indicating euphotic conditions prior to final
deposition. The invertebrate fauna comprises about 155 species and at
least 120 genera. The assemblage is strongly dominated by molluscs which
is unusual for a Palaeozoic deposit and corroborates that aragonite
dissolution produces a major bias in the fossil record. However, most
mollusc genera are also known from other Pennsylvanian occurrences
(replaced shells). This shows that preservation bias via preferential
aragonite dissolution may be overestimated.


FAU Authors / FAU Editors

Seuß, Barbara Dr.
Lehrstuhl für Paläoumwelt


External institutions with authors

Ludwig-Maximilians-Universität (LMU)
Texas A&M University


How to cite

APA:
Seuß, B., Nützel, A., Mapes, R.H., & Yancey, T.E. (2008). The Buckhorn Asphalt deposit – An unique fossil Lagerstätte from the Pennsylvanian of Oklahoma. Paper presentation at GSA, Houston, US.

MLA:
Seuß, Barbara, et al. "The Buckhorn Asphalt deposit – An unique fossil Lagerstätte from the Pennsylvanian of Oklahoma." Presented at GSA, Houston 2008.

BibTeX: 

Last updated on 2018-06-12 at 09:08