The
Monti Sabatini are a geologic region in
Lazio, central
Italy, a remnant of intense
volcanism which started ca. 600,000 years ago, mainly with
pyroclastic and
maar forming
eruptions which continued until 100,000 years ago. They are part of the Lazio's Anti-Apennines. Included between the Monti Sabatini is the
Lake Bracciano, which is a volcanotectonic depression formed about 3.7 Ma, and the
Lake Martignano. The
sedimentary base of the Sabatini complex lies buried under of
volcanic ash and
rocks.