Widespread volcanism associated with Middle Triassic carbonate platforms is well known,
and in many cases referred as a partial cause of the disruption of platform development
due to burial by volcanic material. It is no doubt that silicic explosive volcanism
produced large volume of volcanic material accumulated in basins surrounding the carbonate
platforms (Buchenstein basins) alternating with pelagic carbonates of basin facies.
There are large numbers of mafic eruptive products associated with individual carbonate
platforms such as the Latemar in the Dolomites in northern Italy. These eruptive products
are dominated by mafic dyke swarms which due to their more erodable nature provide
a characteristic castle-like architecture of the present day edifice, having altered
mafic dyke material eroded away between more resistant limestone and dolomite pillars.
Here we present field evidences to demonstrate that there are characteristic zones
of volcaniclastic vertical breccia horizons more consistent with diatreme origin.
In many occasions, such volcanic breccia pipes and associated tilted blocks were used
for demonstrating the casual relationship between tectonic event-generated collapsed
carbonate platform units and accumulation of volcanic material in the resulting basins.
Here we concur with this idea, and provide field evidences that such volcanic breccia
pipes are rather exposed volcanic conduits, resulted from magma and water interaction
driven diatreme formation. This finding from the Latemar in northern Italy highlights
the need of revision of the cause and consequences of different types of volcanism
in the final episodes of the carbonate platform evolution in the Triassic of the Tethys.