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Rhyolite dome, Roccatederighi, Roccastrada, Grosseto Province, Tuscany, Italyi
Regional Level Types
Rhyolite domeDome
Roccatederighi- not defined -
Grosseto ProvinceProvince

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Latitude & Longitude (WGS84):
43° 1' 30'' North , 11° 4' 41'' East
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
Roccatederighi773 (2014)0.4km
Sassofortino748 (2014)2.7km
Montemassi176 (2014)3.8km
Tatti209 (2014)4.2km
Ribolla2,438 (2014)6.9km
Name(s) in local language(s):
Rhyolite Dome, Roccatederighi, Roccastrada, Grosseto, Toscana, Italia

from Poli et. al. (2004):
"A cluster of rhyolitic endogenous and exogenous lava domes crops out in the area of Roccatederighi village. Roccatederighi itself is built over such domes. The rock has both a glassy groundmass containing crystals of quartz, K-feldspar (high-T sanidine), plagioclase, and biotite and a microcrystalline groundmass with the presence of K-feldspar (sanidine) megacrysts that in some cases reach sizes up to 5-10 cm across. The peculiarity of Roccatederighi rocks is the presence of magmatic cordierite crystals. Cordierite occurs as euhedral-subhedral to anhedral crystals in some cases showing a dusty aspect because of alteration into pinite crystals which are often oriented along cracks."

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

5 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

'Albite-Anorthite Series'
Reference: http://www.socgeol.info/altro/documents/guide_books/P70.pdf
Formula: KFe2+3(AlSi3O10)(OH)2
Reference: Marinelli, P., Carletti, P. (1999): Genesis of Roccastrada volcanic rocks (central Italy): inferences from melt inclusions analyses, Periodico di Mineralogia, Vol.: 68, 1, pp. 69-80
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Reference: http://www.socgeol.info/altro/documents/guide_books/P70.pdf
Formula: (Mg,Fe)2Al3(AlSi5O18)
Reference: http://www.socgeol.info/altro/documents/guide_books/P70.pdf
Reference: http://www.socgeol.info/altro/documents/guide_books/P70.pdf
Formula: SiO2
Reference: http://www.socgeol.info/altro/documents/guide_books/P70.pdf
Formula: K(AlSi3O8)
Reference: http://www.socgeol.info/altro/documents/guide_books/P70.pdf
Formula: Zr(SiO4)
Reference: Marinelli, P., Carletti, P. (1999): Genesis of Roccastrada volcanic rocks (central Italy): inferences from melt inclusions analyses, Periodico di Mineralogia, Vol.: 68, 1, pp. 69-80

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Group 9 - Silicates
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-

List of minerals arranged by Dana 8th Edition classification

Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with Al substituted rings
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Unclassified Minerals, Mixtures, etc.
'Albite-Anorthite Series'-

List of minerals for each chemical element

H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
H AnniteKFe32+(AlSi3O10)(OH)2
O Cordierite(Mg,Fe)2Al3(AlSi5O18)
O SanidineK(AlSi3O8)
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
O QuartzSiO2
O ZirconZr(SiO4)
O AnniteKFe32+(AlSi3O10)(OH)2
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Mg Cordierite(Mg,Fe)2Al3(AlSi5O18)
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Al Cordierite(Mg,Fe)2Al3(AlSi5O18)
Al SanidineK(AlSi3O8)
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Al AnniteKFe32+(AlSi3O10)(OH)2
Si Cordierite(Mg,Fe)2Al3(AlSi5O18)
Si SanidineK(AlSi3O8)
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Si QuartzSiO2
Si ZirconZr(SiO4)
Si AnniteKFe32+(AlSi3O10)(OH)2
K SanidineK(AlSi3O8)
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
K AnniteKFe32+(AlSi3O10)(OH)2
Fe Cordierite(Mg,Fe)2Al3(AlSi5O18)
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Fe AnniteKFe32+(AlSi3O10)(OH)2
Zr ZirconZr(SiO4)


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Marinelli, P., Carletti, P. (1999): Genesis of Roccastrada volcanic rocks (central Italy): inferences from melt inclusions analyses, Periodico di Mineralogia, Vol.: 68, 1, pp. 69-80
Poli, G., Perugini, D., Rocchi, S, Dini, A. (2004): A crustal section through intrusive and effusive volcanic complexes of the Tuscan magmatic province (Central Italy), 32nd INTERNATIONAL GEOLOGICAL CONGRESS, Florence 2004

External Links

1) http://www.socgeol.info/altro/documents/guide_books/P70.pdf
2) Bollettino della Società geologica italiana, Volume 10 By Società geologica italiana, 1891

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate

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