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Montaubourg dome, Marcoux, Montbrison, Loire, Auvergne-Rhône-Alpes, Francei
Regional Level Types
Montaubourg domeVolcanic Dome
MarcouxCommune
MontbrisonArrondissement
LoireDepartment
Auvergne-Rhône-AlpesRegion
FranceCountry

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Latitude & Longitude (WGS84):
45° 43' 8'' North , 4° 0' 13'' East
Latitude & Longitude (decimal):
45.71889,4.00361
GeoHash:
G#: u04u54g7f
GRN:
N31E03
Type:
Volcanic Dome
Köppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Marcoux578 (2016)1.1km
Trelins549 (2016)1.3km
Boën-sur-Lignon3,163 (2016)3.1km
Marcilly-le-Châtel1,256 (2018)3.1km
Sail-sous-Couzan1,009 (2016)3.2km
Mindat Locality ID:
214623
Long-form identifier:
mindat:1:2:214623:5
GUID (UUID V4):
0
Other/historical names associated with this locality:
Rhône-Alpes


Old volcanic dome composed of nephelinites (silica-undersaturated lavas). It's the only deposit known of melilite lavas in the Massif Central (others melilite deposits are pyrometamorphic). The best outcrop is a vineyard on the south slope.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


3 valid minerals.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘPerovskite4.CC.30CaTiO3
Group 9 - Silicates
ⓘNepheline9.FA.05Na3K(Al4Si4O16)
ⓘHaüyne9.FB.10Na3Ca(Si3Al3)O12(SO4)
Unclassified
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Pyroxene Group'-ADSi2O6
ⓘ'Melilite Group'-Ca2M(XSiO7)

List of minerals for each chemical element

OOxygen
Oⓘ HaüyneNa3Ca(Si3Al3)O12(SO4)
Oⓘ NephelineNa3K(Al4Si4O16)
Oⓘ PerovskiteCaTiO3
Oⓘ Fayalite-Forsterite Series
Oⓘ Pyroxene GroupADSi2O6
Oⓘ Melilite GroupCa2M(XSiO7)
NaSodium
Naⓘ HaüyneNa3Ca(Si3Al3)O12(SO4)
Naⓘ NephelineNa3K(Al4Si4O16)
MgMagnesium
Mgⓘ Fayalite-Forsterite Series
AlAluminium
Alⓘ HaüyneNa3Ca(Si3Al3)O12(SO4)
Alⓘ NephelineNa3K(Al4Si4O16)
SiSilicon
Siⓘ HaüyneNa3Ca(Si3Al3)O12(SO4)
Siⓘ NephelineNa3K(Al4Si4O16)
Siⓘ Fayalite-Forsterite Series
Siⓘ Pyroxene GroupADSi2O6
Siⓘ Melilite GroupCa2M(XSiO7)
SSulfur
Sⓘ HaüyneNa3Ca(Si3Al3)O12(SO4)
KPotassium
Kⓘ NephelineNa3K(Al4Si4O16)
CaCalcium
Caⓘ HaüyneNa3Ca(Si3Al3)O12(SO4)
Caⓘ PerovskiteCaTiO3
Caⓘ Melilite GroupCa2M(XSiO7)
TiTitanium
Tiⓘ PerovskiteCaTiO3
FeIron
Feⓘ Fayalite-Forsterite Series

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate
EuropeContinent
France

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

MICHEL R. (1958) - Étude pétrographique de quelques laves tertiaires du Forez (Loire). Revue Sciences naturelles Auvergne, t. 21, p. 105-113.
HERNANDEZ J. (1971) - Le volcanisme tertiaire des Monts du Forez et de la plaine de Montbrison. Thèse 3e cycle, Paris VI, 2 t.
BRGM (1980) - Notice de la carte géologique au 1/50 000ème (feuille Montbrison)
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