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Raman spectroscopic investigations of Burgess Shale-type preservation; a new way forward

Alison Olcott Marshall, Randol L. Wehrbein, Bruce S. Lieberman and Craig P. Marshall
Raman spectroscopic investigations of Burgess Shale-type preservation; a new way forward (in Lagerstaetten through time; a collection of exceptional preservational pathways from the terminal Neoproterozoic through today, James D. Schiffbauer (editor) and Marc Laflamme (editor))
Palaios (May 2012) 27 (5): 288-292

Abstract

Study of the Burgess Shale-type deposits of the Cambrian has greatly enhanced scientific understanding of early animal evolution, but as the mechanisms by which these deposits formed are still unclear, here we outline and present data from the application of a new analytical approach, Raman spectroscopy, that can be used to characterize fossils from these deposits. Although these deposits present exceptional views into a diverse, nonbiomineralized to lightly biomineralized biota, this taphonomic regime mostly disappears from the fossil record after the Cambrian, with a few notable exceptions. Numerous detailed taphonomic and chemical studies have provided significant insight into modes of fossil preservation in these deposits, although there is still significant debate regarding the preservational and diagenetic mechanisms that may be involved. Compared to previous electron microscopy-based elemental mapping approaches, which have identified the elemental components of similar fossils, Raman spectroscopy allows a determination of the chemical phases and specific mineralogy at the molecular level, as well as the thermal maturity, of these fossils. This approach therefore provides new types of data, such as hematite phase, that may prove helpful for elucidating some of the mechanisms responsible for the exceptional types of preservation found in these deposits, and potentially helps to resolve the existing taphonomic debates.


ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 27
Serial Issue: 5
Title: Raman spectroscopic investigations of Burgess Shale-type preservation; a new way forward
Title: Lagerstaetten through time; a collection of exceptional preservational pathways from the terminal Neoproterozoic through today
Author(s): Marshall, Alison OlcottWehrbein, Randol L.Lieberman, Bruce S.Marshall, Craig P.
Author(s): Schiffbauer, James D.editor
Author(s): Laflamme, Marceditor
Affiliation: University of Kansas, Department of Geology, Lawrence, KS, United States
Affiliation: Virginia Polytechnic Institute and State Univesity, Nanoscale Characterization and Fabrication Laboratory, Blacksburg, VA, United States
Pages: 288-292
Published: 201205
Text Language: English
Publisher: Society for Sedimentary Geology, Tulsa, OK, United States
Meeting name: Geological Society of America annual meeting
Meeting location: Denver, CO, USA, United States
Meeting date: 20101031Oct. 31-Nov. 3, 2010
References: 40
Accession Number: 2012-065521
Categories: Invertebrate paleontology
Document Type: Serial Conference document
Bibliographic Level: Analytic
Annotation: NSF Grant DEB-0716162
Illustration Description: illus. incl. 1 table
N37°00'00" - N42°00'00", W114°04'60" - W109°04'60"
Secondary Affiliation: Smithsonian Institution National Museum of Natural History, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by SEPM (Society for Sedimentary Geology), Tulsa, OK, United States
Update Code: 201234
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