Jurassic paleokarst in an isolated drowned carbonate platform (External Subbetic, Betic Cordillera, Jaén province)
DOI:
https://doi.org/10.55407/geogaceta113636Keywords:
paleokarst, ammonitico rosso, South Iberian Paleomargin, Mágina Unit, jurassicAbstract
The Sierra Mágina Unit (province of Jaén, southern Spain) belongs to the External Subbetic, an allochthonous subdomain of the Betic External Zones. The External Subbetic is thrusting to the north on the Intermediate Domain. Near this thrust there is a contact between the white oolitic limestones of the Middle Jurassic (Camarena Fm) and the red limestones with ammonitico rosso facies of the Upper Jurassic (Upper Ammonitico Rosso Fm). The oolitic limestones are grainstones of ooids, oncoids, peloids, cortoids, micritic intraclasts and bioclasts deposited on an isolated shallow-water carbonate platform. The ammonitico rosso limestones are a condensed, nodular, brecciated or massive facies with ammonites and microfacies of wackestones and packstones of filaments, Saccocoma and other bioclasts, deposited on a pelagic carbonate platform. The top of the Camarena Fm has a karstic morphology. The isolated carbonate platform was created from the Jurassic rifting in the Pliensbachian which affected the South Iberian Paleomargin. After uplift and karstification of this platform, due to tectonic and/or relative sea-level changes, this structural uplift was drowned, marking the beginning of condensed pelagic carbonate sedimentation in the karstified pelagic swells.
References
Alvaro, M., Hernández-Samaniego, A., Del Olmo, P. y Soler, M. (1991). Mapa Geológico de España 1:50.000, hoja nº 948 (Torres) y memoria. ITGE, Madrid, 71 p.
Bice, D.M. y Stewart, K.G. (1986). En: Carbonate platforms. Facies, sequences and evolution (M.E. Tucker, J.L. Wilson, J.F., Crevello, J.F. Sarg y J.F. Read, Eds.). Special Publications IAS, Oxford, 9, 145-168.
Ford, D. y Williams, P. (2007). Karst Hydrology and Geomorphology. John Wiley & Sons, Chichester, England, 562 p. https://doi.org/10.1002/9781118684986
Land, L.A. y Paull, C.K. (2000). Geo-Marine Letters 20. 123-132. https://doi.org/10.1007/s003670000041
McIlreath, I.A. y James, N.P. (1984) En: Facies Models, 2nd ed. (R.G. Walker, Ed.), Geoscience Canada, Toronto, 245- 258.
Molina, J.M. (2000). En: Programa Internacional de Correlación Geológica: Desarrollo y perspectivas en España. (M.A. Lamolda, Ed.). Temas Geológico-Mineros 30, ITGE, Madrid, 133-139.
Molina, J.M., Reolid, M. y Mattioli, E. (2018). Facies 64, 19. https://doi.org/10.1007/s10347-018-0532-5
Molina, J.M., Ruiz-Ortiz, P.A. y Vera, J.A. (1995). Sedimentology 42, 957-969. https://doi.org/10.1111/j.1365-3091.1995.tb00420.x
Molina, J.M., Ruiz-Ortiz, P.A. y Vera, J.A. (1999). Sedimentary Geology 129, 71-84. https://doi.org/10.1016/S0037-0738(99)00089-5
Mylroie, J.E. y Carew, J.L. (1995). En: Unconformities and porosity in carbonate strata (D.A. Budd, A.H. Saller y P.M. Harris, Eds.). Memoir AAPG, Tulsa, 63, 55-76.
Nieto, L.M., Ayadi, C., Fraguas, A., Molina, J.M. y Reolid, M. (2024). Journal of Iberian Geology 50, 503-528. https://doi.org/10.1007/s41513-024-00254-w
Pirazzoli, P.A. (1986). En: Sea-level Research: a manual for the collection and evaluation of data (O. van de Plassche, Ed.), GeoBooks, Norwich, 361-400. https://doi.org/10.1007/978-94-009-4215-8_12
Santantonio, M., Galluzzo, F. y Gill, G. (1996). Palaeopelagos 6, 123-169.
Santantonio, M., Innamorati, G., Cipriani, A., Antonelli, M. y Fabbi, S. (2024). Journal of Iberian Geology 50, 252-268. https://doi.org/10.1007/s41513-024-00243-z
Trenhaile, A.S. (2015). Earth-Science Reviews 150, 285-304. https://doi.org/10.1016/j.earscirev.2015.08.003
Vera, J.A., Ruiz-Ortiz, P.A., García-Hernández, M. y Molina, J.M. (1988). En: Paleokarst (N.P. James y Choquette, P.W., Eds.). Springer, New York, 364-384. https://doi.org/10.1007/978-1-4612-3748-8_18
Wright, V.P. y Smart, P.L. (1994). En: Diagenesis IV (K.H. Wolf y G.V. Chilingarian, Eds.). Elsevier, Amsterdam, 477-517. https://doi.org/10.1016/S0070-4571(08)70447-3
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