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An upper Tuvalian platform-basin system in the Julian Alps: the start-up of the Dolomia Principale (Southern Alps, Italy).

By GIANOLLA P. and ROGHI G. AND DE ZANCHE V.

Abstract

East of Cave del Predil (formerly Raibl), a platform-basin transition of the Dolomia Principale (Hauptdolomit) is spectacularly exposed at a seismic scale. Therefore, the eastern margin of the vast domain of the Dolomia Principale, facing the Slovenian Basin, is documented. Despite of strong dolomitization of the massive margin, some sedimentary structures and fossils have been recognized. Corals seem to be very rare and sponges to be absent, whereas serpulids and marine phreatic cements seem to have been the main components of the framework. Interior platform bedded dolomites lap off the massive margin. Clinoforms interfinger with upper Tuvalian basinal deposits (Carnitza Formation). This setting documents the start-up of the Dolomia Principale during late Tuvalian time. Moreover, this margin of the Dolomia Principale is the more ancient so far pointed out. It testifies to the recovery of a rimmed platform after the late Julian-early Tuvalian crisis

Topics: CARBONATE PLATFORM MARGIN - SERPULIDS – CYANOBACTERIA - JULIAN ALPS – ITALY - UPPER TRIASSIC
Year: 2003
OAI identifier: oai:iris.unife.it:11392/1203518
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