Showing papers by "Francesco Muto published in 2003"

Eustatic and tectonic control on fan development along the Tyrrhenian coast of Calabria (Southern Italy)

Abstract: The study area represents a portion of the onshore belt located on the eastern margin of the Tyrrhenian extensional basin (Coastal Range). This sector of Calabria consists of a thrust-pile (Calabrian Arc Auct.), including both metamorphic and non-metamorphic rocks. In particular, the metamorphites constitute the basement for a sin-rift sequence of post-orogenic Late Miocene sedimentary rocks (Amantea Basin, in Patacca et al., 1990) and, in turn, overlain by Quaternary deposits (Sorriso-Valvo and Sylvester, 1993; Robustelli et al., 2002). Structural analysis evidences three sets of major fault systems; They affect a monocline consisting of a complex folded morphostructure. The oldest structures collected, are represented by two generations of folds, with axes oriented roughly NNW-SSE and NE-SW. The NNW-SSE axial trend, characterize the southern sector. The NNW-SSE trending faults are dip-slip and oblique extensional faults as suggested by superimposition of the striations. The relative chronology suggests that the youngest kinematics is represented by right-lateral normal faults. The NE-trending faults are oblique normal and dip-slip faults; the latter is compatible with the kinematics of the right-lateral NNW trend. Geomorphological analysis allow two generations of alluvial-fans to be distinguished; furthermore valley-side perched alluvial terraces occur in the lower reaches of the valley descending from tha Coastal Range. The two generation of alluvial fan are telescopically arranged, and the apexes of the piedmont fans (1 st generation) are entrenched with respect of perched terraces. The fans at issue derived from steep catchments developed as consequent and/or subsequent river valleys debouching from the mountain front. The piedmont zone comprises the 1 st