A Caltech Library Service

Arid Coastal Carbonates and the Phanerozoic Record of Carbonate Chemistry

Smith, B. P. and Cantine, M. D. and Bergmann, K. D. and Ramos, E. J. and Martindale, R. C. and Kerans, C. (2021) Arid Coastal Carbonates and the Phanerozoic Record of Carbonate Chemistry. AGU Advances, 2 (3). Art. No. e2021AV000386. ISSN 2576-604X. doi:10.1029/2021av000386.

[img] PDF - Published Version
Creative Commons Attribution.

[img] PDF (Original Version of Manuscript) - Submitted Version
See Usage Policy.

[img] PDF (First Revision of Manuscript) - Submitted Version
See Usage Policy.

[img] PDF (Second Revision of Manuscript [Accepted]) - Accepted Version
See Usage Policy.

[img] PDF (Supporting Information S1) - Supplemental Material
See Usage Policy.

[img] PDF (Peer Review History) - Supplemental Material
See Usage Policy.

[img] PDF (Authors' Response to Peer Review Comments) - Supplemental Material
See Usage Policy.


Use this Persistent URL to link to this item:


Ocean chemistry and carbonate sedimentation link Earth's climate, carbon cycle, and marine pH. The carbonate system in seawater is complex and there are large uncertainties in key parameters in deep time. Here, we link sedimentary textures formed in arid coastal environments and preserved in the rock record to past seawater carbonate chemistry. Prior to the mid-Mesozoic, tepee structures and pisoids – features associated with peritidal environments – co-vary with available shelf area during cycles of supercontinent formation and rifting. In contrast, tepees and pisoids are consistently scarce after the mid-Mesozoic, which coincides with a radiation in pelagic calcifiers as well as the breakup of Pangea. Numerical models suggest that the global and temporal abundances of tepee structures and pisoids are correlated with secular shifts in seawater chemistry, and that trends likely reflect the underlying influence of tectonics and biotic innovation on marine alkalinity and the saturation states of carbonate minerals. As independent sedimentary proxies, tepees and pisoids serve as benchmarks for global carbon cycle models and provide a new proxy record of seawater chemistry that can help discern links among tectonics, biotic innovation, and seawater chemistry.

Item Type:Article
Related URLs:
URLURL TypeDescription
Smith, B. P.0000-0003-3189-8717
Bergmann, K. D.0000-0002-6106-2059
Ramos, E. J.0000-0002-2919-2865
Martindale, R. C.0000-0003-2681-083X
Kerans, C.0000-0002-3544-9006
Additional Information:© 2021. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Issue Online: 06 August 2021; Version of Record online: 06 August 2021; Manuscript accepted: 12 June 2021; Manuscript revised: 07 June 2021; Manuscript received: 12 January 2021. B. P. Smith and C. Kerans acknowledge funding from the Reservoir Characterization Research Lab through the Bureau of Economic Geology. M. D. Cantine received support from the National Defense Science and Engineering Graduate Fellowship and K. D. Bergmann received support from the David and Lucile Packard Foundation. B. P. Smith thanks Chris Zahm, Scott Tinker, and Toti Larson for comments on an early version of the manuscript. The authors declare no conflicts of interest relevant to this study. Data Availability Statement: Data tabulated from the literature as well as any R scripts used for analysis and modeling are available as supplemental files and through and through a Github repository (
Funding AgencyGrant Number
Bureau of Economic GeologyUNSPECIFIED
National Defense Science and Engineering Graduate (NDSEG) FellowshipUNSPECIFIED
David and Lucile Packard FoundationUNSPECIFIED
Subject Keywords:Carbonates; carbon cycle; mid-Mesozoic; ocean chemistry
Issue or Number:3
Record Number:CaltechAUTHORS:20210831-211253848
Persistent URL:
Official Citation:Smith, B. P., Cantine, M. D., Bergmann, K. D., Ramos, E. J., Martindale, R. C., & Kerans, C. (2021). Arid coastal carbonates and the Phanerozoic record of carbonate chemistry. AGU Advances, 2, e2021AV000386.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:110669
Deposited By: Tony Diaz
Deposited On:31 Aug 2021 21:27
Last Modified:31 Aug 2021 21:27

Repository Staff Only: item control page