Lastreghe stone is extracted in one quarry in Lastreghe (Ponte nelle Alpi), on the orographic left of the Piave valley, at about 520 m above sea level. On this slope, white bioclastic limestones emerge, with the strata orientated in the direction of the slope, with same inclination more or less.
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Lithostratigraphy (see Italy Geological Map, 1:50.000 scale, sheet 063 Belluno): in this particular sector of the Belluno Basin: Calcari del Fadalto Formation, followed by the Cugnan and Scaglia Rossa Formation above and by the Biancone Formation at the base (Cretaceous sup.). They have the following lithological characteristics.
- Formazione di Cugnan e Scaglia Rossa (Cugnan Formation and Scaglia Rossa): Paleocene – Cretaceous (Santonian – Maastrichtian); alternating light grey biocalcarenites, marl limestones and reddish clay marlstones in globoborotallides; reddish slab-shaped calcareous marlstones and marl limestones in globotroncanidides, truncarotaloidides, inocerami and ichnofossils, flint in the lower part, with calcarenites and whitish bioclastic breccias.
- Formazione dei Calcari del Fadalto (Fadalto Limestones Formation): Cretaceous (Abian/Cenomanian – Santonian); hazel-coloured calcarenites and bioclastic breccias with fragments of rudists and caprinidae. Indistinct stratification or in meters-thick layers.
- Biancone: Cretaceous (Tithonian p.p.– late Cretaceous): well stratified white and grey flint micrites, with sporadic interbedded graded biocalcarenites. Also rough calcarenites (local Soccher limestone).
- In particular, in this particular sector of Belluno Basin, Lastreghe Stone consists of white and hazel-coloured calcarenites and bioclastic calcirutides, in tabular strata, from dm to 1 m thick.