DOLOMITES - Annexes 2-8 - Provincia di Udine

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NOMINATION OF THE DOLOMITES FOR INSCRIPTION ON THE WORLD NATURAL HERITAGE LIST UNESCO 66 packstone-wackestones in which the identifiable grains correspond to pellets, oolites, coated grains, micritic intraclasts, minute quartz grains, fragments of bivalves, gastropods and echinoderms, porcellanaceous and agglutinate foraminifers, Dasycladaceae algae and sponge spicules, as well as oolithic-pisolitic grainstones, where the total absence of a matrix leads to the assumption that these are well-swashed deposits. The ooliths have concentric radial structure and the nucleus comprises small foraminifers, gastropod protoconchs, Globochaete and even bivalve fragments in the pisolites. Intercalated with the described lithotypes are horizons with lumachella and red-greenish pelites horizons. At the level of the outcrop in the oolithic-pisolitic grainstones one can identify low-angle crossed laminations. Scheme of the stratigraphical relationships between the units characterizing the Trento Platform and the relative successions of the Belluno Basin. This large carbonate platform displays a very complex evolution that is controlled in a large part by the synsedimentary tectonics and generally records progressive phases of drowning. For example, while in the area to the south of the Valsugana Line and towards the Dolomiti di Brenta the platform was still productive and Rotzo Formation or the Massone Oolithic Limestone deposited, in the western Dolomites deposits were characterized by encrinites. These sediments take the name of Encrinite di Fanes Piccola and their deposits are interpreted as encrinitic sandwaves migration caused by the action of sea currents in a sinking open plateau (Masetti & Bottoni, 1978). The Trento Platform and the Calcari Grigi thus started to diversify and to record steadily deeper environments, more and more proximate to the open sea. While towards the west (Dolomiti di Brenta) whitish or hazel carbonate muds accumulated (Corna Formation and Tofino Formation), towards the inner platform, the tidal flats transformed into vast marshes and lagoons in which enormous bivalves (Lithiotis) proliferated. As the lacerating movements of the Pangea intensified, the most internal Trento Platform also started to sink. In the most external zones, near to the Lumbardy Basin, yellowish muds accumulated (Tenno Formation) while further towards the interior the Calcari Grigi unit was covered by great masses of ooliths (small spherules of calcium carbonate caused to roll by the force of the waves) and by crinoid fragments that gave origin to the San Vigilio Oolite formation (western border of the ancient Trento Platform). In the Belluno Basin, on the contrary, a thick succession of sediments accumulated that records, in great detail, the regression phase of the platform. The Soverzene Formation (Hettangian – Pliensbachian sup.) is, in fact, characterized by dolomites and locally by gray, bituminous micrites, sometimes chert-containing, organized in thin beds, and that frequently pass (Schiara Dolostone)
NOMINATION OF THE DOLOMITES FOR INSCRIPTION ON THE WORLD NATURAL HERITAGE LIST UNESCO 67 to chaotic accumulation of breccias with sharp-edged chert clasts wrapped in a dolomites matrix. These breccias represent chaotic bodies of slope and marginal materials that have collapsed into the basin following an intense extensional tectonics. The area of the Schiara/Talvena system documents in an exceptional way this part of the Trento Platform margin towards the Belluno Basin and enables the step-by-step analysis of the evolution of this part of Southern Alps during the paroxystic rifting phases. The successive drowning phases with the final collapse of the eastern margin of the Trento Platform, that sank rapidly, evolving into a high pelagic bottom, are documented by the Igne Formation, which buried the paleoslopes and covered the lowered platform blocks. Southern cliff of mtSchiara with the famous Gusela del Vescovà in the centre. the higher part of the mountain is made of breccias dipping eastward, overlaying the horizontal strata of the Calcari Grigi Group.
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Provincia di Belluno Provincia Auto
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ANNEX 2 A2.1 GEOLOGY A2.2 FLORA AND
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ANNEXES NOMINATION OF THE DOLOMITES
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NOMINATION OF THE DOLOMITES FOR INS
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ANNEX 3 A3.1 LETTERS OF SUPPORT
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Systems: 1. Pelmo - Nuvolau 2. Marm
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visitors NOMINATION OF THE DOLOMITE
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others (malghe, alberghi, ristorant
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mountain cabins others (malghe, alb
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visitors footpath NOMINATION OF THE
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ANNEX 5 A5.1 PROTECTIVE DESIGNATION
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11. NOMINATION OF THE DOLOMITES FOR
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49. 50. 51. NOMINATION OF THE DOLOM
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ANNEX 7 A7.1 DVD (PHOTOGRAPHS) A7.2
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159 160- 161 NOMINATION OF THE DOLO
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fauna NOMINATION OF THE DOLOMITES F
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ANNEX 8 A8.1 OTHER LOCAL AUTHORITIE
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DOLOMITES - Annexes 2-8 - Provincia di Udine

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