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Multiproxy record of abrupt sea-surface cooling across the Eocene-Oligocene transition in the Gulf of Mexico

(2012) GEOLOGY. 40(2). p.159-162
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Abstract
The Eocene-Oligocene transition (EOT; ca. 33-34 Ma) was a time of pronounced climatic change, marked by the establishment of continental-scale Antarctic ice sheets. The timing and extent of temperature change associated with the EOT is controversial. Here we present multiproxy EOT climate records (similar to 15-34 k.y. resolution) from St. Stephens Quarry, Alabama, USA, derived from foraminiferal Mg/Ca, delta O-18, and TEX86. We constrain sea-surface temperatures (SSTs) in the latest Eocene and early Oligocene and address the issue of climatic cooling during the EOT. Paleotemperatures derived from planktic foraminifera Mg/Ca and TEX86 are remarkably consistent and indicate late Eocene subtropical SSTs of >28 degrees C. There was substantial and accelerated cooling of SSTs (3-4 degrees C) through the latest Eocene "precursor" delta O-18 shift (EOT-1), prior to Oligocene Isotope-1 (Oi-1). Our multispecies planktic foraminiferal delta O-18 records diverge at the E/O boundary (33.7 Ma), signifying enhanced seasonality in the earliest Oligocene in the Gulf of Mexico.
Keywords
CLIMATE TRANSITION, ISOPRENOID TETRAETHER LIPIDS, TEMPERATURE, ICE, BOUNDARY, FORAMINIFERA, GLACIATION, ISOTOPES, ALABAMA, NORTH

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Citation

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MLA
Wade, Bridget S, Alexander JP Houben, Willemijn Quaijtaal, et al. “Multiproxy Record of Abrupt Sea-surface Cooling Across the Eocene-Oligocene Transition in the Gulf of Mexico.” GEOLOGY 40.2 (2012): 159–162. Print.
APA
Wade, B. S., Houben, A. J., Quaijtaal, W., Schouten, S., Rosenthal, Y., Miller, K. G., Katz, M. E., et al. (2012). Multiproxy record of abrupt sea-surface cooling across the Eocene-Oligocene transition in the Gulf of Mexico. GEOLOGY, 40(2), 159–162.
Chicago author-date
Wade, Bridget S, Alexander JP Houben, Willemijn Quaijtaal, Stefan Schouten, Yair Rosenthal, Kenneth G Miller, Miriam E Katz, James D Wright, and Henk Brinkhuis. 2012. “Multiproxy Record of Abrupt Sea-surface Cooling Across the Eocene-Oligocene Transition in the Gulf of Mexico.” Geology 40 (2): 159–162.
Chicago author-date (all authors)
Wade, Bridget S, Alexander JP Houben, Willemijn Quaijtaal, Stefan Schouten, Yair Rosenthal, Kenneth G Miller, Miriam E Katz, James D Wright, and Henk Brinkhuis. 2012. “Multiproxy Record of Abrupt Sea-surface Cooling Across the Eocene-Oligocene Transition in the Gulf of Mexico.” Geology 40 (2): 159–162.
Vancouver
1.
Wade BS, Houben AJ, Quaijtaal W, Schouten S, Rosenthal Y, Miller KG, et al. Multiproxy record of abrupt sea-surface cooling across the Eocene-Oligocene transition in the Gulf of Mexico. GEOLOGY. 2012;40(2):159–62.
IEEE
[1]
B. S. Wade et al., “Multiproxy record of abrupt sea-surface cooling across the Eocene-Oligocene transition in the Gulf of Mexico,” GEOLOGY, vol. 40, no. 2, pp. 159–162, 2012.
@article{3098187,
  abstract     = {The Eocene-Oligocene transition (EOT; ca. 33-34 Ma) was a time of pronounced climatic change, marked by the establishment of continental-scale Antarctic ice sheets. The timing and extent of temperature change associated with the EOT is controversial. Here we present multiproxy EOT climate records (similar to 15-34 k.y. resolution) from St. Stephens Quarry, Alabama, USA, derived from foraminiferal Mg/Ca, delta O-18, and TEX86. We constrain sea-surface temperatures (SSTs) in the latest Eocene and early Oligocene and address the issue of climatic cooling during the EOT. Paleotemperatures derived from planktic foraminifera Mg/Ca and TEX86 are remarkably consistent and indicate late Eocene subtropical SSTs of >28 degrees C. There was substantial and accelerated cooling of SSTs (3-4 degrees C) through the latest Eocene "precursor" delta O-18 shift (EOT-1), prior to Oligocene Isotope-1 (Oi-1). Our multispecies planktic foraminiferal delta O-18 records diverge at the E/O boundary (33.7 Ma), signifying enhanced seasonality in the earliest Oligocene in the Gulf of Mexico.},
  author       = {Wade, Bridget S and Houben, Alexander JP and Quaijtaal, Willemijn and Schouten, Stefan and Rosenthal, Yair and Miller, Kenneth G and Katz, Miriam E and Wright, James D and Brinkhuis, Henk},
  issn         = {0091-7613},
  journal      = {GEOLOGY},
  keywords     = {CLIMATE TRANSITION,ISOPRENOID TETRAETHER LIPIDS,TEMPERATURE,ICE,BOUNDARY,FORAMINIFERA,GLACIATION,ISOTOPES,ALABAMA,NORTH},
  language     = {eng},
  number       = {2},
  pages        = {159--162},
  title        = {Multiproxy record of abrupt sea-surface cooling across the Eocene-Oligocene transition in the Gulf of Mexico},
  url          = {http://dx.doi.org/10.1130/G32577.1},
  volume       = {40},
  year         = {2012},
}

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