Title

Experimental Effects of Burning and Boiling on Modern Land Snail Shell δ18 O and δ13 C

Presenter Information

Nathaniel Morse
Rowan Kaufman

Document Type

Oral Presentation

Location

SURC Ballroom A

Start Date

17-5-2012

End Date

17-5-2012

Abstract

An analysis of the effects of experimental burning and boiling on the isotopic composition of shell aragonite in a land based gastropod found no comparable difference between unmodified and modified specimens. Specifically, this analysis sought to address the effects on the chemical composition of shell aragonite which is expected to remain unchanged through time excepting the process of diagenesis. To test this hypothesis, experiments were conducted on twenty one modern specimens of Oreohelix strigosa collected near Knight Creek in Idaho. The shells were divided into three test groups. One shell group remained unmodified, one group was roasted, and one group was boiled. Shells were later tested for δ18O and δ13C composition through Finnegan GasBench II analysis. Additionally, this study investigated qualitative methods for testing shell aragonite finding that a minimum sample size of 200μg is required for testing. This research can be used to facilitate research in paleothermometric studies and the effects of diagenesis.

Poster Number

38

Faculty Mentor(s)

Pat Lubinski, Steve Hackenberger

Additional Mentoring Department

Anthropology

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May 17th, 8:30 AM May 17th, 11:00 AM

Experimental Effects of Burning and Boiling on Modern Land Snail Shell δ18 O and δ13 C

SURC Ballroom A

An analysis of the effects of experimental burning and boiling on the isotopic composition of shell aragonite in a land based gastropod found no comparable difference between unmodified and modified specimens. Specifically, this analysis sought to address the effects on the chemical composition of shell aragonite which is expected to remain unchanged through time excepting the process of diagenesis. To test this hypothesis, experiments were conducted on twenty one modern specimens of Oreohelix strigosa collected near Knight Creek in Idaho. The shells were divided into three test groups. One shell group remained unmodified, one group was roasted, and one group was boiled. Shells were later tested for δ18O and δ13C composition through Finnegan GasBench II analysis. Additionally, this study investigated qualitative methods for testing shell aragonite finding that a minimum sample size of 200μg is required for testing. This research can be used to facilitate research in paleothermometric studies and the effects of diagenesis.