2026-06-29T16:48:29Zhttps://docta.ucm.es/rest/oai/request
oai:docta.ucm.es:20.500.14352/1371102026-06-03T00:10:44Zcom_20.500.14352_14col_20.500.14352_21
Docta Complutense author Rodríguez Martínez, Marta author Cózar, Pedro author Mas Mayoral, José Ramón author Rodríguez García, Sergio editor Ahr, Wayne M. editor Harris, Paul M. editor Morgan, William A. editor Somerville, Ian D. 2026-06-02T15:26:01Z 2026-06-02T15:26:01Z 2003-12 Rodríguez-MARTÍNEZ, M. et al. (2003) «Upper Viséan Saccamminopsis-sponge microbial mud mounds, Sierra de la Estrella, Southwestern Spain», Permo-Carboniferous Carbonate Platforms and Reefs, pp. 189-200. 1-56576-087-5 https://hdl.handle.net/20.500.14352/137110 https://www.sepm.org/ Dome-shaped mud mounds ranging in size from 2 m to 25 m thick and from 2 m to 100 m in diameter are present in the Upper Viséan of Sierra de la Estrella, Guadiato Valley, in the Sierra Morena region of SW Iberian Peninsula. The mounds are composed of up to 70% peloidal matrix and contain a varied but sparse assemblage including bryozoans, crinoids, brachiopods, calcareous algae, foraminifers, and gastropods. A three-stage biotic succession is recognizable in the mounds. The first stage consists of crinoid–sponge spicule packstones. The second stage is represented by a low-diversity, autochthonous assemblage of scattered sponges and up to 40–60% by volume of the microproblematical taxon Saccamminopsis fusulinaeformis (McCoy). The third stage consists of peloidal framework and cementstone with abundant primary growth cavities. These rocks are interpreted to be microbial boundstone-cementstone. The three stages of mound growth developed below storm wave base, and the probable coeval, level-bottom beds consisting of marls are interpreted to have been deposited in a dysphotic environment. eng Upper Viséan Saccamminopsis-sponge microbial mud mounds, Sierra de la Estrella, Southwestern Spain book part 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URL https://docta.ucm.es/bitstreams/1592264c-075a-4f57-9735-7e9a4785e4d5/download File MD5 8267bee60526280cb546236dcbc67df0 13276738 application/pdf Rodriguez-Martinez_etal_2003_Saccamminopsis-moundSEPM.pdf