@article{34949c07b18a40a392b2f8d9dc209c31,
title = "Facies control on carbonate δ13C on the Great Bahama Bank",
abstract = "The carbon isotopic (δ13C) composition of shallow-water carbonates often is interpreted to reflect the δ13C of the global ocean and is used as a proxy for changes in the global carbon cycle. However, local platform processes, in addition to meteoric and marine diagenesis, may decouple carbonate δ13C from that of the global ocean. We present new δ13C measurements of benthic foraminifera, solitary corals, calcifying green algae, ooids, coated grains, and lime mud from the modern Great Bahama Bank. We find that vital effects, cross-shelf seawater chemistry gradients, and meteoric diagenesis produce carbonate with δ13C variability rivaling that of the past two billion years of Earth history. Leveraging Walther{\textquoteright}s Law, we illustrate how these local δ13C signals can find their way into the stratigraphic record of bulk carbonate.",
author = "Geyman, {Emily C.} and Maloof, {Adam C.}",
note = "Funding Information: We thank J. Birch, the staff of the Small Hope Bay Lodge, and the Bahamas Environment, Science and Technology Commission for making work possible on Andros Island. We thank L. O{\textquoteright}Connor and T. Humes for field assistance. Thank you to J. Curtis for analyzing seawater samples, and S. Ravi for generously providing access to lab instruments. Finally, we thank editor J. Schmitt and J. Husson, P. Hoffman, J. Strauss, M. Ingalls, and anonymous reviewers for thoughtful comments that improved the manuscript. This material is based on work supported by U.S. National Science Foundation grant 1410317, the High Meadows Environmental Institute (Princeton University, USA), and the Geological Society of America Stephen G. Pollock Student Research Grant. Funding Information: We thank J. Birch, the staff of the Small Hope Bay Lodge, and the Bahamas Environment, Science and Technology Commission for making work possible on Andros Island. We thank L. O?Connor and T. Humes for field assistance. Thank you to J. Curtis for analyzing seawater samples, and S. Ravi for generously providing access to lab instruments. Finally, we thank editor J. Schmitt and J. Husson, P. Hoffman, J. Strauss, M. Ingalls, and anonymous reviewers for thoughtful comments that improved the manuscript. This material is based on work supported by U.S. National Science Foundation grant 1410317, the High Meadows Environmental Institute (Princeton University, USA), and the Geological Society of America Stephen G. Pollock Student Research Grant. Publisher Copyright: {\textcopyright} 2021 Geological Society of America. For permission to copy, contact editing@geosociety.org.",
year = "2021",
month = sep,
doi = "10.1130/G48862.1",
language = "English (US)",
volume = "49",
pages = "1049--1054",
journal = "Geology",
issn = "0091-7613",
publisher = "Geological Society of America",
number = "9",
}