Abstract
To evaluate the potential for the study of Late Pennsylvanian seasonality, detailed isotopic and elemental analyses were performed on a single specimen of the brachiopod Neospirifer dunbari. Contours of 18O, Mg, Na, and S concentrations parallel growth bands and reveal a record of 1 1/2 to 2 cycles. Mg, S, and Na contents varied inversely with δ18O. This trend is opposite to the expected diagenetic trend and is consistent with the temperature dependences of Mg content and δ18O, thus implying preservation of shell chemistry. The ~1.2‰ range in δ18O values suggests a seasonal temperature variation of 5 to 6°C. This high seasonality for the tropical epicontinental sea of Kansas supports climate-model predictions of enhanced continentality in Pangean climate. -Authors
| Original language | English |
|---|---|
| Pages (from-to) | 661-664 |
| Number of pages | 4 |
| Journal | Geology |
| Volume | 22 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1994 Jan 1 |
Fingerprint
ASJC Scopus subject areas
- Geology
Cite this
Late Pennsylvanian seasonality reflected in the 18O and elemental composition of a brachiopod shell. / Horng-Sheng Mii, Mii; Grossman, E. L.
In: Geology, Vol. 22, No. 7, 01.01.1994, p. 661-664.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Late Pennsylvanian seasonality reflected in the 18O and elemental composition of a brachiopod shell
AU - Horng-Sheng Mii, Mii
AU - Grossman, E. L.
PY - 1994/1/1
Y1 - 1994/1/1
N2 - To evaluate the potential for the study of Late Pennsylvanian seasonality, detailed isotopic and elemental analyses were performed on a single specimen of the brachiopod Neospirifer dunbari. Contours of 18O, Mg, Na, and S concentrations parallel growth bands and reveal a record of 1 1/2 to 2 cycles. Mg, S, and Na contents varied inversely with δ18O. This trend is opposite to the expected diagenetic trend and is consistent with the temperature dependences of Mg content and δ18O, thus implying preservation of shell chemistry. The ~1.2‰ range in δ18O values suggests a seasonal temperature variation of 5 to 6°C. This high seasonality for the tropical epicontinental sea of Kansas supports climate-model predictions of enhanced continentality in Pangean climate. -Authors
AB - To evaluate the potential for the study of Late Pennsylvanian seasonality, detailed isotopic and elemental analyses were performed on a single specimen of the brachiopod Neospirifer dunbari. Contours of 18O, Mg, Na, and S concentrations parallel growth bands and reveal a record of 1 1/2 to 2 cycles. Mg, S, and Na contents varied inversely with δ18O. This trend is opposite to the expected diagenetic trend and is consistent with the temperature dependences of Mg content and δ18O, thus implying preservation of shell chemistry. The ~1.2‰ range in δ18O values suggests a seasonal temperature variation of 5 to 6°C. This high seasonality for the tropical epicontinental sea of Kansas supports climate-model predictions of enhanced continentality in Pangean climate. -Authors
UR - http://www.scopus.com/inward/record.url?scp=84874955758&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84874955758&partnerID=8YFLogxK
U2 - 10.1130/0091-7613(1994)022<0661:LPSRIT>2.3.CO
DO - 10.1130/0091-7613(1994)022<0661:LPSRIT>2.3.CO
M3 - Article
AN - SCOPUS:84874955758
VL - 22
SP - 661
EP - 664
JO - Geology
JF - Geology
SN - 0091-7613
IS - 7
ER -