THE ROCKS

Mount Baldo is composed prevalently of carbonate sedimentary rocks formed by marine organisms.  These rocks were uplifted as a result of pressure exerted by tectonic forces from two opposite directions:  the Pre-Alps of Brescia on one side, the block of the Lessinia Mounts on the other.

Triassic (200 million to 240 million  years ago)

– Main Dolomite – consisting of alternate layers of calcium-magnesium carbonate and algal mats (stromatolites).

Jurassic (135 million to 200 million years ago)

– Calcari Grigi di Noriglio Formations: these rocks are gray due to the presence of organic matter deposited in shallow water.

– San Vigilio Oolitic Limestone; light hazel, consisting in spherical grains of calcite (oolites) that formed as a result of the movement of tidal currents.

– Red Verona Marble: this limestone rich in macrofossils (ammonites) bears witness to the sinking of the ocean floor in the period of formation.

Cretaceus (65 million to 135 million years ago)

– Biancone: ivory white limestone thickly laminated with layers of flint, formed from sediments of great depth (over a 1000 meters).

– Scaglia Rossa: thickly laminated limestone, is reddish due to the presence of clay containing iron oxides.

Eocene (25 million to 65 million years ago)

– Torbole Limestone and Malcesine Limestone – fossiliferous limestone very rich in remains of marine organisms (nummulites, corals and echinoderms).

– Lavas and tuffs – produced by localized volcanic phenomena.

– Nago and Monte delle Erbe Limestone – these rocks result from a further deposition of calcareous sediments on surfaces already covered by tuffs and basaltic lavas.

Oligocene (less than 25 million years ago)

– Acquenere rock formations: can be considered as the last deposition on Mount Baldo of marine carbonate-rich detrital sediments.

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