Abstract
The Early and Middle Carnian succession of the Bergamasc Alps (Southern Alps, Italy) was deposited in three different environments: a deltaic depositional system passing seaward to a lagoon (or bay) and then to a carbonate platform. The corresponding lithofacies (sandstones and siltstones; shales and limestones) are organized in “high-frequency” cycles. Fining-upward trends are typical of the subaerial delta plain cycles, and shallowing-upward trends are widespread in the lagoon and platform cycles. The genesis of the lagoonal and carbonate platform cycles is possibly accounted for by sea-level changes, mainly controlled by small-scale eustatic oscillations. Sea-level changes are interpreted as exerting a major control also in the development of the deltaic cycles.
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