2026-06-29T02:40:49Zhttps://docta.ucm.es/rest/oai/request
oai:docta.ucm.es:20.500.14352/345492023-08-25T13:29:07Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense author Creveling, Jessica R. author Fernández Remolar, David author Rodríguez Martínez, Marta author Menéndez, Silvia author Bergmann, Kristin D. author Gill, Benjamin C. author Abelson, John author Amils, Ricardo author Ehlmann, Bethany L. author García Bellido, Diego author Grotzinger, John P. author Hallmann, Christian author Stack, Kathryn M. author Knoll, Andrew H. 2023-06-19T13:52:16Z 2023-06-19T13:52:16Z 2013-09-05 0031-0182 10.1016/j.palaeo.2013.06.015 https://hdl.handle.net/20.500.14352/34549 https://dx.doi.org/10.1016/j.palaeo.2013.06.015 https://www.sciencedirect.com/journal/palaeogeography-palaeoclimatology-palaeoecology 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. eng Atribución-NoComercial-SinDerivadas 3.0 España Geobiology of a lower Cambrian carbonate platform, Pedroche Formation, Ossa Morena Zone, Spain journal article URL https://docta.ucm.es/bitstreams/a1cd852f-7c8e-4cc8-8272-650bc534be10/download File MD5 c71cbcc713bc2651da7be2421cbcfc9f 20144961 application/pdf 1-s2.0-S0031018213002927-main.pdf URL https://docta.ucm.es/bitstreams/aefd0cf6-e6b6-4d3a-9f32-66db060d9085/download File MD5 883abb74b0fbee7364f2c78e01314c78 3814922 application/pdf hdl_81130.pdf URL https://docta.ucm.es/bitstreams/64b91f81-fb4c-408e-8c2f-7e9ba4115315/download File MD5 be07f510b05418fc8f18461d4cdf723d 135810 text/plain 1-s2.0-S0031018213002927-main.pdf.txt URL https://docta.ucm.es/bitstreams/6a6991ba-39ae-4aac-abee-82813e14c044/download File MD5 5f3b160efbed683c8c6c629b202986c6 117892 text/plain hdl_81130.pdf.txt