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Dosso Valley, Como Province, Lombardy, Italyi
Regional Level Types
Dosso ValleyValley
Como ProvinceProvince
LombardyRegion
ItalyCountry

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Key
Latitude & Longitude (WGS84):
46° 12' 23'' North , 9° 14' 13'' East
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Name(s) in local language(s):
Valle del Dosso, Provincia di Como, Lombardia, Italia


Formely known as Mugiam Valley (Val Mugiam), it entirely belongs to Dosso del Liro minicipality. This wilderness area, located west of Dosso del Liro village, is the left-side branch of the main Liro Valley (the right branch is known as San Jorio Valley), which ends at the northwestern corner of Lake Como, near the small town of Gravedona.

The upper Dosso Valley is surrounded by a ring of peaks, including (from east to west) Monte Durìa (2264 m), Costa degli Orsi, Pizzo Campanile (2459 m), Pizzo Caurga (2419 m), Pizzo Martello or Piz Martel (2450 m), Mater de Paia (2482 m), and Monte Cardinello (2520 m), that divides it from Darengo Valley (Livo municipality, Como Province) to the east, Bodengo Valley (Sondrio Province) and Cama Valley (Val Mesolcina/Misox, Graubünden, Switzerland) to the north, and Grono Valley (Val Mesolcina/Misox, Graubünden, Switzerland) to the west.

From the car park at Pian Castagno it takes two hours to reach Alpe Madri (1293 m a.s..l), situated at the beginning of the upper valley, where mineral collectors can start looking for typical minerals of this area.

The most typical minerals occur in pegmatites that are part of the so-called Bodengo pegmatite area, a large region including the upper portions of a series of valleys (Leggia and Cama valleys, Moesa, Graubünden, Switzerland; Bodengo, Soè and Garzelli valleys, Sondrio Province, Lombardy, Italy; Dosso and Darengo valleys, Como Province, Lombardy, Italy) located between the Mesolcina (west) and Mera (east) valleys, Southern Steep Belt of the Central Alps.

As in the neighbouring valleys the pegmatite dykes are embedded in migmatites. Most of the pegmatite dykes are located above 2000 m a.s.l. The main collecting places for pegmatite minerals are Mater de Paia area, Val Caurga, and Costa degli Orsi (between Pizzo Campanile and Passo dell'Orso).

Kyanite- and sillimanite-bearing schists and amphibolites sometimes occur.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


8 valid minerals.

Detailed Mineral List:

'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Bertolini, A. (1994): Alto Lario occidentale, Gravedona (CO). Rivista Mineralogica Italiana, 17, 1 (1-1994), 73-76.
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Reference: Taravella G. (1994): Le pegmatiti in Lombardia. Ed. privata, Milano, pages 39-41.
Beryl
Formula: Be3Al2(Si6O18)
Reference: Bertolini, A. (1994): Alto Lario occidentale, Gravedona (CO). Rivista Mineralogica Italiana, 17, 1 (1-1994), 73-76; Taravella G. (1994): Le pegmatiti in Lombardia. Ed. privata, Milano, pages 39-41.
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Reference: Bertolini, A. (1994): Alto Lario occidentale, Gravedona (CO). Rivista Mineralogica Italiana, 17, 1 (1-1994), 73-76.
Chalcopyrite
Formula: CuFeS2
Reference: Bertolini, A. (1994): Alto Lario occidentale, Gravedona (CO). Rivista Mineralogica Italiana, 17, 1 (1-1994), 73-76.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Taravella G. (1994): Le pegmatiti in Lombardia. Ed. privata, Milano, pages 39-41.
'K Feldspar'
Reference: Bertolini, A. (1994): Alto Lario occidentale, Gravedona (CO). Rivista Mineralogica Italiana, 17, 1 (1-1994), 73-76; Taravella G. (1994): Le pegmatiti in Lombardia. Ed. privata, Milano, pages 39-41.
Kyanite
Formula: Al2(SiO4)O
Reference: Taravella G. (1994): Le pegmatiti in Lombardia. Ed. privata, Milano, pages 39-41.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Bertolini, A. (1994): Alto Lario occidentale, Gravedona (CO). Rivista Mineralogica Italiana, 17, 1 (1-1994), 73-76; Taravella G. (1994): Le pegmatiti in Lombardia. Ed. privata, Milano, pages 39-41.
Pyrite
Formula: FeS2
Reference: Bertolini, A. (1994): Alto Lario occidentale, Gravedona (CO). Rivista Mineralogica Italiana, 17, 1 (1-1994), 73-76.
Quartz
Formula: SiO2
Reference: Bertolini, A. (1994): Alto Lario occidentale, Gravedona (CO). Rivista Mineralogica Italiana, 17, 1 (1-1994), 73-76; Taravella G. (1994): Le pegmatiti in Lombardia. Ed. privata, Milano, pages 39-41.
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Bertolini, A. (1994): Alto Lario occidentale, Gravedona (CO). Rivista Mineralogica Italiana, 17, 1 (1-1994), 73-76.
Sillimanite
Formula: Al2(SiO4)O
Reference: Bertolini, A. (1994): Alto Lario occidentale, Gravedona (CO). Rivista Mineralogica Italiana, 17, 1 (1-1994), 73-76.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 9 - Silicates
Beryl9.CJ.05Be3Al2(Si6O18)
Kyanite9.AF.15Al2(SiO4)O
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Sillimanite9.AF.05Al2(SiO4)O
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Garnet Group'-X3Z2(SiO4)3
'K Feldspar'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
Kyanite52.2.2c.1Al2(SiO4)O
Sillimanite52.2.2a.1Al2(SiO4)O
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Six-Membered Rings with borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Garnet Group'-X3Z2(SiO4)3
'K Feldspar'-

List of minerals for each chemical element

HHydrogen
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H ApatiteCa5(PO4)3(Cl/F/OH)
H MuscoviteKAl2(AlSi3O10)(OH)2
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
BeBeryllium
Be BerylBe3Al2(Si6O18)
BBoron
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
O Garnet GroupX3Z2(SiO4)3
O BerylBe3Al2(Si6O18)
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O ApatiteCa5(PO4)3(Cl/F/OH)
O MuscoviteKAl2(AlSi3O10)(OH)2
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
O KyaniteAl2(SiO4)O
O QuartzSiO2
O SillimaniteAl2(SiO4)O
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
FFluorine
F ApatiteCa5(PO4)3(Cl/F/OH)
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
NaSodium
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
AlAluminium
Al BerylBe3Al2(Si6O18)
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Al KyaniteAl2(SiO4)O
Al SillimaniteAl2(SiO4)O
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
SiSilicon
Si Garnet GroupX3Z2(SiO4)3
Si BerylBe3Al2(Si6O18)
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Si KyaniteAl2(SiO4)O
Si QuartzSiO2
Si SillimaniteAl2(SiO4)O
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
PPhosphorus
P ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
S ChalcopyriteCuFeS2
S PyriteFeS2
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
CaCalcium
Ca ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
FeIron
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
CuCopper
Cu ChalcopyriteCuFeS2

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Taravella G. (1994): Le pegmatiti in Lombardia. Ed. privata, Milano, pages 39-41.
Bertolini, A. (1994): Alto Lario occidentale, Gravedona (CO). Rivista Mineralogica Italiana, 17, 1 (1-1994), 73-76.

Other Regions, Features and Areas containg this locality

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