By Evan K. Franseen, Mateu Esteban, William C. Ward, Jean-Marie Rouchy
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Extra info for Models for Carbonate Stratigraphy from Miocene Reef Complexes of Mediterranean Regions (SEPM Concepts in Sedimentology & Paleontology 5)
One of the most intriguing geometries is the large-scale (1-2 km) downward shift (downstepping, "offlapping" in the sense of Swain, 1949) of the progradational units involving monogeneric reef frameworks and reef slopes. This was first recognized by Esteban et al. (1977a, b) and described by Dabrio et al. (1981; see also Fig. 184 in James, 1983) and interpreted to be the result of a gradual seal-level lowering by evaporation prior to evaporite deposition in the basin. Esteban and Giner (1980), Santisteban (1981), Manlciewicz (1987), Franseen (1989), Ott d'Estevou (1980), Bernet Rollande et al.
1977a, b) pointed out that BB features were also present in some coral reefs in the Terminal Complex and discussed the significance of the survival of corals after extensive evaporite deposition. Esteban et al. (1977a, b) recognized a global cooling trend and a decrease in coral diversity during Miocene time (as demon- strated by Chevalier, 1961, 1977) and referred to the Late Miocene Mediterranean as a "coral refuge" with connections or influences from colder, adjacent Atlantic waters without coral reefs (Figs.
Tuscany, Melilla). Poorly diversified coral reefs tend to occur in basins with diatomites, but the opposite is not true. , this volume). Martin and Braga (1990) and Dabrio et al. (1985) also reported lateral transition and downlapping of prograding the cause of any aberrant feature or stress in the markedly Halimeda slopes of BB reefs onto diatomites. In any case, many stenohaline coral reef community (echinoderms, Halimeda, red algae). Esteban et al. (1977a, b) and Esteban (1978, 1979) never suggested that these "aberrant" reefs grew in hypersaline conditions; it was only assumed that they were somehow connected to a series of environmental factors in deteriorating marine conditions that preceded extensive evaporite deposition.
Models for Carbonate Stratigraphy from Miocene Reef Complexes of Mediterranean Regions (SEPM Concepts in Sedimentology & Paleontology 5) by Evan K. Franseen, Mateu Esteban, William C. Ward, Jean-Marie Rouchy