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Prima segnalazione di quarziti a scisti a Leuchtenbergite nel basamento austridico del Fo Merano
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New chemical data and a review on the South-Alpine "Pre-Hercynian rhyolitic plateau" in Eastern Alps.
No full textPre-Alpine and Alpine developments of the austridic basement in the Sopron Area (Eastern Alps, Hungary)
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On the genesis of some Leuchtenbergite-bearing metamorphic rocks and their phase relations
No full textGeo-petrographic data on the metamorphic rocks with Cambrian, Silurian and Devonian fossils in the Agordo area (Southalpine metamorphic basement of the Eastern Alps, Italy).
No full textRecently, in the Agordo area, some unquestionable fossils have been described: 1) Latest Cambrian acritarchs,
within trivial black, fine grained phyllites (Col di Foglia); 2) Aeronian graptolites, within boudins along a recrystallized shear
zone cutting low-grade metapelites (Ponte Alto); 3) Middle Devonian Rugosa corals, within metalimestone boudins along
the mentioned shear zone. These fossil findings are unique in this basement, therefore, the rocks containing them deserve
a careful petrographic investigation. This paper presents the basic petrographic features of the rock samples containing
the fossils. All the rocks underwent a greenschist facies metamorphism (chlorite zone) under a thermal gradient of ca.
38°C/Km. The most interesting rocks are those bearing well preserved graptolites which mainly consist of quartz,
fluorapatite (up to 70%.), carbonaceous matter and sulphides. T in the boudins turns out to be slightly lower than in the
surrounding matrix
Petrography of the metamorphic rocks from the Agordo area bearing latest Cambrian, Aeronian and Devonian fossils (Southalpine metamorphic basement of the Eastern Alps, Italy).
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The Austridic eclogites, metabasites and metaultrabasites from the Pohorje area (Eastern Alps, Yugoslavia): 1. The eclogites and related rocks
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