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Geographical
sections. Alpine Regions, eastern area, Trentino Alto Adige, Bolzano prov (Alto
Adige/Tirolo), Alpe di Siusi |
Selection
of images from the collection. ©
Fernando Metelli. All the photos and other material on this site are copyright,
if you wish to use them please contact me for permission
Alpe di Siusi is the Europe's
largest high Alpine pasture, originated by igneous volcanic rocks. It is
closed to the Fassa Valley, that is geologically and mineralogically quite
similar (go to the devoted page)
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Analcime
The most frequent occurrence of basaltic and basic igneous rocks: this
single white X is 4cm wide. Large XX
are usually opaque like this one
9.5x8cm
Rio Fromm, Catelrotto, Alpe di Siusi, Bolzano. Italy
Specimen n.511
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Apophyllite
Elongated X, nearly tabular, 1.8x1cm. In the cavity there is some
white analcime (bottom and right) and brown "chabazite" XX
7x6cm
Laifreider Holle, Alpe di Siusi. Bolzano. Italy
Specimen n.519
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Apophyllite
Tabular and thin X, 2xcm wide, surrounded by analcime
6x4cm
Laifreider Holle, Alpe di Siusi. Bolzano. Italy
Specimen n.510 |
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Baryte
Some baryte rosettes, up to 0.8cm wide, in a cavity of the volcanic rock filled
with small calcite XX
8x8cm
Cime di Terrarossa (Dialer Bohlen), Alpe di
Siusi, Bolzano. Italy
Specimen n.817
Another photo: bigger
view
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Calcite
Scalenohedrons up to 4.2 cm
8x8cm
Molignon, Alpe di
Siusi, Bolzano. Italy
Specimen n.1305
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Datolite
Tabular XX, well defined, up to 0.5cm long, in a cavity 3x1.5cm wide,
with analcime
7x5cm
Laifreider Holle, Alpe di Siusi. Bolzano. Italy
Specimen n.815
Another photo: a
bigger view |
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Datolite
Twinned XX, pale green and semitransparent, in a cavity filled
with analcime
7x5cm
Laifreider Holle, Alpe di Siusi. Bolzano. Italy
Specimen n.1307
Another photo: a
bigger view |
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Goethite
Tuft
of acicular XX, 0.1 cm wide, posted on quartz colored by green
celadonite
4x4cm
Dialer Bohlen, Alpe di Siusi. Bolzano. Italy
Specimen n.804 |
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Natrolite
Cavity filled with pinkish thin prismatic XX of Natrolite,
transparent at the tips. Area of 4.5x3.5cm. There are some small analcime
XX, semitransparent . It is a classic sample from Alpe di Siusi
9x9cm
Piz Sella, Alpe di Siusi. Bolzano. Italy
Specimen n.515
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Stilbite
Spherules of radial XX of this mineral, known with the local name
of puflerite (from the local name of the place = Pufler
Lock). There are also two "chabazite" XX. Maybe not very aesthetic,
but interesting, in my opinion
5x5cm
Forra di Bulla, Alpe di Siusi, Bolzano. Italy
Specimen n.524
Another photo: a bigger
view
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