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Scalcoggia Creek, Madesimo, Spluga Valley (San Giacomo Valley), Valchiavenna, Sondrio Province, Lombardy, Italy

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Latitude & Longitude (WGS84): 46° 28' 19'' North , 9° 22' 20'' East
Latitude & Longitude (decimal): 46.47203,9.37243
GeoHash:G#: u0q8m7bz1
Area:1.0 km2
Locality type:Creek
Köppen climate type:Dfc : Subarctic climate
Name(s) in local language(s):Torrente Scalcoggia, Madesimo, Valle Spluga (Valle San Giacomo), Valchiavenna, Sondrio, Lombardia, Italia

Sparse outcrops of phosphate-bearing "basal quartzite" (Suretta Nappe) along the left (hydrographic) side of the small Scalcoggia Valley. Uphill of the pathway.

Phosphates are layered along S0 (lithological bands) whilst pyrophyllite occurs in cross-cutting veins.

Regions containing this locality

The Alps, Europe

Mountain Range - 2,202 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

2 valid minerals.

Detailed Mineral List:

Formula: (Mg,Fe2+)Al2(PO4)2(OH)2
Colour: Light blue
Description: Light blue colored rough crystals and masses up to few centimeters. Color is definitely lighter with respect to Lazulite coming from the nearby Alp Groppera
Reference: Bedogné, F., Maurizio, R., Montrasio, A. & Sciesa, E. (1995): I Minerali Della Provincia Di Sondrio e Della Bregaglia Grigionese: Val Bregaglia, Val Masino, Val Codera E Valle Spluga. Bettini, Sondrio, Italia, 300 pp
Formula: Al2Si4O10(OH)2
Habit: radiating sprays
Colour: whitish
Description: from cross-cutting veins (late stage idrothermalism)
Reference: Bedogné, F., Maurizio, R., Montrasio, A. & Sciesa, E. (1995): I Minerali Della Provincia Di Sondrio e Della Bregaglia Grigionese: Val Bregaglia, Val Masino, Val Codera E Valle Spluga. Bettini, Sondrio, Italia, 300 pp

List of minerals arranged by Strunz 10th Edition classification

Group 8 - Phosphates, Arsenates and Vanadates
Group 9 - Silicates

List of minerals arranged by Dana 8th Edition classification

Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers

List of minerals for each chemical element

H Lazulite(Mg,Fe2+)Al2(PO4)2(OH)2
H PyrophylliteAl2Si4O10(OH)2
O Lazulite(Mg,Fe2+)Al2(PO4)2(OH)2
O PyrophylliteAl2Si4O10(OH)2
Mg Lazulite(Mg,Fe2+)Al2(PO4)2(OH)2
Al Lazulite(Mg,Fe2+)Al2(PO4)2(OH)2
Al PyrophylliteAl2Si4O10(OH)2
Si PyrophylliteAl2Si4O10(OH)2
P Lazulite(Mg,Fe2+)Al2(PO4)2(OH)2

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on


ID: 2366036
Metamorphe Gesteine, meist Metasedimente

Age: Anthropocene ( Ma)

Lithology: Gneiss and mica schist

Reference: Geological Institute. Geological Map of Switzerland 1:500,000. isbn: 3906723399. University of Bern. [49]

201.3 - 251.902 Ma

ID: 3159302
Jura moutains, Penninic nappes, Austroalpine nappes, Southern Alpes

Age: Triassic (201.3 - 251.902 Ma)

Description: low grade metamorphic

Lithology: Meta-sediment group

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Cambrian - Proterozoic
485.4 - 2500 Ma

ID: 3189284
Precambrian-Phanerozoic crystalline metamorphic rocks

Age: to Cambrian (485.4 - 2500 Ma)

Comments: Alps

Lithology: Crystalline metamorphic rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License


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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Bedogné, F., Maurizio, R., Montrasio, A. & Sciesa, E. (1995): I Minerali Della Provincia Di Sondrio e Della Bregaglia Grigionese: Val Bregaglia, Val Masino, Val Codera E Valle Spluga. Bettini, Sondrio, Italia, 300 pp

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