“Dolomite stone” is extracted in I Piegn area (San Tomaso Agordino). In this area the slopes consist of accumulations from old landslides: debris deposits and huge stone blocks fallen from above.
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Lithostratigraphy: Dolomia del Serla Formation, followed by Livinallongo Formation above and by Richtofen Conglomerate and the Werfen formation at the base (Triassic). They have the following lithological characteristics.
- Livinallongo Formation (upper Anisian): Marl limestones, nodular limestones, marlstones and densely stratified tufa.
- Dolomia della Serla Formation (lower Anisian): Dolomites and Dolomitic limestones stratified in stratified banks or hardly stratified.
- Richtofen Conglomerate (lower Anisian): more or less gross conglomerates with interbedded reddish marlstones and clay and Werfen Formation (lower Anisian): marl limestones and oolitic limestones with interbedded sandstones and siltstones, more or less stratified.