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Geobiology of a lower Cambrian carbonate platform, Pedroche Formation, Ossa Morena Zone, Spain

Creveling, Jessica R. and Fernández-Remolar, David and Rodríguez-Martínez, Marta and Menéndez, Silvia and Bergmann, Kristin D. and Gill, Benjamin C. and Abelson, John and Amils, Ricardo and Ehlmann, Bethany L. and García-Bellido, Diego C. and Grotzinger, John P. and Hallmann, Christian and Stack, Kathryn M. and Knoll, Andrew H. (2013) Geobiology of a lower Cambrian carbonate platform, Pedroche Formation, Ossa Morena Zone, Spain. Palaeogeography, Palaeoclimatology, Palaeoecology, 386 . pp. 459-478. ISSN 0031-0182.

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The Cambrian Pedroche Formation comprises a mixed siliciclastic–carbonate succession recording subtidal deposition on a marine platform. Carbonate carbon isotope chemostratigraphy confirms previous biostratigraphic assignment of the Pedroche Formation to the Atdabanian regional stage of Siberia, correlative to Cambrian Series 2. At the outcrop scale, thrombolitic facies comprise ~ 60% of carbonate-normalized stratigraphy and coated-grains another ~ 10%. Petrographic point counts reveal that skeletons contribute at most 20% to thrombolitic inter-reef and reef-flank lithologies; on average, archaeocyath clasts make up 68% of skeletal materials. In contrast, petrographic point counts show that skeletons comprise a negligible volume of biohermal and biostromal thrombolite, associated nodular carbonate facies, and ooid, oncoid and peloid grainstone facies. As such, archaeocyathan reefal bioconstructions represent a specific and limited locus of skeletal carbonate production and deposition. Consistent with data from coeval, globally dispersed lower Cambrian successions, our analysis of the Pedroche Formation supports the view that lower Cambrian carbonates have more in common with earlier, Neoproterozoic deposits than with younger carbonates dominated by skeletal production and accumulation.

Item Type:Article
Related URLs:
URLURL TypeDescription
Ehlmann, Bethany L.0000-0002-2745-3240
Grotzinger, John P.0000-0001-9324-1257
Stack, Kathryn M.0000-0003-3444-6695
Knoll, Andrew H.0000-0003-1308-8585
Additional Information:© 2013 Elsevier B.V. Received 9 March 2013, Revised 5 June 2013, Accepted 10 June 2013, Available online 22 June 2013. We thank the Agouron Institute for generous support as well as Daniel Schrag and Greg Eischeid for access to the Harvard University Laboratory for Geochemical Oceanography, where carbonate isotopic analyses were completed. We also thank Sara Pruss and an anonymous reviewer for constructive comments that helped to improve this paper.
Funding AgencyGrant Number
Agouron InstituteUNSPECIFIED
Subject Keywords:Cambrian; Carbonate; Thrombolite; Skeletons; Archaeocyath
Record Number:CaltechAUTHORS:20131111-091214313
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Official Citation:Jessica R. Creveling, David Fernández-Remolar, Marta Rodríguez-Martínez, Silvia Menéndez, Kristin D. Bergmann, Benjamin C. Gill, John Abelson, Ricardo Amils, Bethany L. Ehlmann, Diego C. García-Bellido, John P. Grotzinger, Christian Hallmann, Kathryn M. Stack, Andrew H. Knoll, Geobiology of a lower Cambrian carbonate platform, Pedroche Formation, Ossa Morena Zone, Spain, Palaeogeography, Palaeoclimatology, Palaeoecology, Volume 386, 2013, Pages 459-478, ISSN 0031-0182, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42349
Deposited By: Ruth Sustaita
Deposited On:11 Nov 2013 20:06
Last Modified:18 Feb 2020 18:44

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