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The “Scaly-Clays Complex” is the prevailing rock formation in the section of the Appennines between Emilia and Tuscany, but many different kinds of alloctonous rocks may be observed there; ophiolites are frequent and, among them, the so-ca/led “Green Rocks” (gabbros, diabases, serpentinites). They are chaotically and accidentally embedded in the clastic sedimentary clays; probably originated by intensive submarine volcanic activity between Corsica and Tuscany, they were fragmented and moved along the Appennines by orogeny between Cretaceous and Pliocene. Ophiolitic outcroppings are well known in Tuscany in the Rognosi Mts, Val di Cecina, Livornesi Mts, Serchio Valley and in the area of Monte Ferrato/Impruneta near Florence . The Meleto quarry (also said Palagio quarry), where the special clay far the famous “Cotto Fiorentino” floor-tiles is exploited, is located near Impruneta; grey-green hydrothermalites (serpentinites, carbonates, quartz) outcrop there, frequently crossed by calcite veins with interesting mineralizations including Ni-minerals.
Most of the minerals found in the quarry occur as well cristallized micro specimens so they are hereafter described with reference to their matrix rocks; it is impossible to locate the various occurrences within the quarry, due to continuous and active exploiting.
MINERALS IN SERPENTINITES.
Talc (“Steatite “): Within the rare masses of serpentine there are calcite veins inside which there are aesthetic aggregate mammillary of steatite. Perhaps the most aesthetic specimens at European level. As out standing , bright-green specimens. It occurs as either mammillary or globular aggregates to even 2 cm in diameter, grouped to cover large surfaces. Usually fluorescent in yellow.
MINERALS IN CARBONATIC VEINS AND HYDROTHERMALITES.
MINERALS IN HYDROTHERMALITES.
MINERALS IN SCALY CLAYS.
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