Morphology and geological setting of Iseo Lake (Lombardy) through multibeam bathymetry and high-resolution seismic profiles
Articolo
Data di Pubblicazione:
2007
Citazione:
Morphology and geological setting of Iseo Lake (Lombardy) through
multibeam bathymetry and high-resolution seismic profiles / A. Bini, D. Corbari, P. Falletti, M. Fassina, C. R. Perotti, A. Piccin. - In: SWISS JOURNAL OF GEOSCIENCES. - ISSN 1661-8726. - 100:1(2007 Jan), pp. 23-40. [10.1007/s00015-007-1204-6]
Abstract:
The Regione Lombardia geological mapping program (CARG), in collaboration
with the Istituto Nazionale di Oceanografia e Geofisica Sperimentale of
Trieste (OGS), realized a geophysical study of Iseo Lake (Sebino).
A multibeam survey and high-resolution single-channel seismic lines allowed
the recognition of five physiographic units with different morphologies
and evolution: the Oglio prodelta in the northern part of the lake; a central
basin with a regular flat floor between –240 and –256 m in depth; the Monte
Isola submerged escarpment, bounding the western shores of Monte Isola and
emerging at the small islands of San Paolo and Loreto; the Sale Marasino
plateau, with a maximum depth of –100 m, between Monte Isola and the eastern
shores of the lake; and the southern Sarnico Basin.
In the single-channel seismic profiles crossing the central basin, the uppermost
part of the sedimentary infill of Iseo Lake can be subdivided into
three sequences, interpreted from top to base as recent lacustrine deposits,
glacial deposits recording the last glacial maximum expansion, and lacustrine
deposits.
The morphology of the lake was to a large degree shaped prior to the last
glacial maximum (LGM) expansion, as erosional action exerted by the LGM
glacier was much reduced. The Oglio prodelta, the fan deltas skirting the lake
shores and the landslides along the submerged slopes of the lake occurred subsequent
to the retreat of the LGM glacier.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Bathymetry; Geomorphology; High-resolution seismic; Iseo Lake; Lacustrine sediments; Last glacial maximum expansion
Elenco autori:
A. Bini, D. Corbari, P. Falletti, M. Fassina, C.R. Perotti, A. Piccin
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