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Le Semnon, Martigné-Ferchaud, Ille-et-Vilaine, Brittany, Francei
Regional Level Types
Le Semnon- not defined -
Martigné-Ferchaud- not defined -
Ille-et-VilaineDepartment
BrittanyRegion
FranceCountry

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Latitude & Longitude (WGS84): 47° 50' 28'' North , 1° 21' 10'' West
Latitude & Longitude (decimal): 47.84137,-1.35292
GeoHash:G#: gbx01jqb4
Köppen climate type:Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Martigné-Ferchaud2,619 (2016)2.9km
Forges-la-Forêt269 (2016)5.7km
Fercé559 (2016)7.0km
Noyal-sur-Brutz529 (2016)7.4km
Coësmes1,168 (2016)8.0km


"Southeast of Rennes on the D163 until Corps-Nuds. Take the D41 until Retiers and follow the D94. In the Le Semnon mine and its dumps one will encounter (gold-bearing) arsenopyrite." [Belot, 1978]

Old antimony mine which yielded 500 metric tonnes of antimony between 1895 and 1918.
Later, small quantities of gold were mined, after recognition of its presence in the ore.

Regions containing this locality

Eurasian PlateTectonic Plate
EuropeContinent

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


29 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: Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Allophane
Formula: (Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Reference: Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Reference: Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Antimony
Formula: Sb
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111; Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
'Apatite'
Reference: Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Arsenopyrite
Formula: FeAsS
Reference: Belot, Victor R. (1978) Guide des minéraux, coquillages et fossiles: où les trouver en France, comment les reconnaître et les collectionner (Guides Horay). Pierre Horay (Ed.), 224 pp.; Pillard, F., Chauris, L., and Laforêt, C. (1985) Inventaire minéralogique de la France, 13, 106-111. Ed. B.R.G.M..; Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M.-C., Boulvais, P., Gumiaux, C., Cagnard, F., Guazou, F., and Gapais, D. (2018) Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews, 97, 109-142.
Aurostibite
Formula: AuSb2
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111; Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Berthierite
Formula: FeSb2S4
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111; Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Bournonite
Formula: PbCuSbS3
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111; Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Calcite
Formula: CaCO3
Colour: white, brown, grey
Description: Few automorphes crystals in quartz geodes with stibnite.
Reference: Inventaire minéralogique de la France n°13(1976) -PIERROT_CHAURIS_LAFORET; Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Chalcopyrite
Formula: CuFeS2
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111; Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Chalcostibite
Formula: CuSbS2
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111; Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
'Chlorite Group'
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111; Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Goethite
Formula: α-Fe3+O(OH)
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111
Gold
Formula: Au
Reference: Belot, Victor R. (1978) Guide des minéraux, coquillages et fossiles: où les trouver en France, comment les reconnaître et les collectionner (Guides Horay). Pierre Horay (Ed.), 224 pp.; Pillard, F., Chauris, L., and Laforêt, C. (1985) Inventaire minéralogique de la France, 13, 106-111. Ed. B.R.G.M..; Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M.-C., Boulvais, P., Gumiaux, C., Cagnard, F., Guazou, F., and Gapais, D. (2018) Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews, 97, 109-142.
Graphite
Formula: C
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111
Hematite
Formula: Fe2O3
Reference: Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Ilmenite
Formula: Fe2+TiO3
Reference: Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Kermesite
Formula: Sb2S2O
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111
Lepidocrocite
Formula: γ-Fe3+O(OH)
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111
Leucoxene
Reference: Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111
Marcasite
Formula: FeS2
Reference: Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Muscovite var: Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
Reference: Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Pyrite
Formula: FeS2
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111; Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Pyrrhotite
Formula: Fe7S8
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111; Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Quartz
Formula: SiO2
Reference: Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Rutile
Formula: TiO2
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111; Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Sphalerite
Formula: ZnS
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111; Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Stibnite
Formula: Sb2S3
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111; Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Tetrahedrite
Formula: Cu6[Cu4(Fe,Zn)2]Sb4S13
Reference: Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Ullmannite
Formula: NiSbS
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111; Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M. C., ... & Gapais, D. (2018). Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews.
Valentinite
Formula: Sb2O3
Reference: Pillard F., Chauris L., Laforêt C. (1985), Inventaire minéralogique de la France, Ed. BRGM, n°13, pp: 106-111

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Antimony1.CA.05Sb
Gold1.AA.05Au
Graphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
Aurostibite2.EB.05aAuSb2
Berthierite2.HA.20FeSb2S4
Bournonite2.GA.50PbCuSbS3
Chalcopyrite2.CB.10aCuFeS2
Chalcostibite2.HA.05CuSbS2
Kermesite2.FD.05Sb2S2O
Marcasite2.EB.10aFeS2
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Stibnite2.DB.05Sb2S3
Tetrahedrite2.GB.05Cu6[Cu4(Fe,Zn)2]Sb4S13
Ullmannite2.EB.25NiSbS
Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Hematite4.CB.05Fe2O3
Ilmenite4.CB.05Fe2+TiO3
Lepidocrocite4.FE.15γ-Fe3+O(OH)
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Valentinite4.CB.55Sb2O3
Group 5 - Nitrates and Carbonates
Ankerite5.AB.10Ca(Fe2+,Mg)(CO3)2
Calcite5.AB.05CaCO3
Group 9 - Silicates
Allophane9.ED.20(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Illite9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Apatite'-
'Chlorite Group'-
Leucoxene-
'Limonite'-(Fe,O,OH,H2O)

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Semi-metals and non-metals
Antimony1.3.1.2Sb
Graphite1.3.6.2C
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 2:3
Stibnite2.11.2.1Sb2S3
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Aurostibite2.12.1.11AuSb2
Marcasite2.12.2.1FeS2
Pyrite2.12.1.1FeS2
Ullmannite2.12.3.3NiSbS
Oxysulfides
Kermesite2.13.1.1Sb2S2O
Group 3 - SULFOSALTS
3 <ø < 4
Tetrahedrite3.3.6.1Cu6[Cu4(Fe,Zn)2]Sb4S13
ø = 3
Bournonite3.4.3.2PbCuSbS3
ø = 2
Berthierite3.7.9.3FeSb2S4
Chalcostibite3.7.5.1CuSbS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Ilmenite4.3.5.1Fe2+TiO3
Valentinite4.3.11.1Sb2O3
AX2
Rutile4.4.1.1TiO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Lepidocrocite6.1.2.2γ-Fe3+O(OH)
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
AB(XO3)2
Ankerite14.2.1.2Ca(Fe2+,Mg)(CO3)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Allophane71.1.5.1(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
var: Illite71.2.2d.2K0.65Al2.0[Al0.65Si3.35O10](OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Albite-Anorthite Series'-
'Apatite'-
'Chlorite Group'-
Leucoxene-
'Limonite'-(Fe,O,OH,H2O)

List of minerals for each chemical element

HHydrogen
H Goethiteα-Fe3+O(OH)
H Limonite(Fe,O,OH,H2O)
H Lepidocrociteγ-Fe3+O(OH)
H Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
H Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
CCarbon
C GraphiteC
C AnkeriteCa(Fe2+,Mg)(CO3)2
C CalciteCaCO3
OOxygen
O Goethiteα-Fe3+O(OH)
O KermesiteSb2S2O
O Limonite(Fe,O,OH,H2O)
O Lepidocrociteγ-Fe3+O(OH)
O RutileTiO2
O ValentiniteSb2O3
O AnkeriteCa(Fe2+,Mg)(CO3)2
O IlmeniteFe2+TiO3
O HematiteFe2O3
O QuartzSiO2
O Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
O MuscoviteKAl2(AlSi3O10)(OH)2
O Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
O CalciteCaCO3
MgMagnesium
Mg AnkeriteCa(Fe2+,Mg)(CO3)2
AlAluminium
Al Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
SiSilicon
Si QuartzSiO2
Si Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
SSulfur
S BerthieriteFeSb2S4
S SphaleriteZnS
S BournonitePbCuSbS3
S ChalcopyriteCuFeS2
S ChalcostibiteCuSbS2
S KermesiteSb2S2O
S ArsenopyriteFeAsS
S PyriteFeS2
S StibniteSb2S3
S PyrrhotiteFe7S8
S UllmanniteNiSbS
S MarcasiteFeS2
S TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
KPotassium
K Muscovite (var: Illite)K0.65Al2.0[Al0.65Si3.35O10](OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca AnkeriteCa(Fe2+,Mg)(CO3)2
Ca CalciteCaCO3
TiTitanium
Ti RutileTiO2
Ti IlmeniteFe2+TiO3
FeIron
Fe BerthieriteFeSb2S4
Fe ChalcopyriteCuFeS2
Fe Goethiteα-Fe3+O(OH)
Fe Limonite(Fe,O,OH,H2O)
Fe Lepidocrociteγ-Fe3+O(OH)
Fe ArsenopyriteFeAsS
Fe PyriteFeS2
Fe PyrrhotiteFe7S8
Fe MarcasiteFeS2
Fe AnkeriteCa(Fe2+,Mg)(CO3)2
Fe IlmeniteFe2+TiO3
Fe HematiteFe2O3
Fe TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
NiNickel
Ni UllmanniteNiSbS
CuCopper
Cu BournonitePbCuSbS3
Cu ChalcopyriteCuFeS2
Cu ChalcostibiteCuSbS2
Cu TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
ZnZinc
Zn SphaleriteZnS
Zn TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
AsArsenic
As ArsenopyriteFeAsS
SbAntimony
Sb AntimonySb
Sb AurostibiteAuSb2
Sb BerthieriteFeSb2S4
Sb BournonitePbCuSbS3
Sb ChalcostibiteCuSbS2
Sb KermesiteSb2S2O
Sb StibniteSb2S3
Sb ValentiniteSb2O3
Sb UllmanniteNiSbS
Sb TetrahedriteCu6[Cu4(Fe,Zn)2]Sb4S13
AuGold
Au AurostibiteAuSb2
Au GoldAu
PbLead
Pb BournonitePbCuSbS3

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 Macrostrat.org

Late Ordovician
443.8 - 458.4 Ma



ID: 3156941
detrital and euxinic deposit

Age: Late Ordovician (443.8 - 458.4 Ma)

Description: low grade metamorphic

Lithology: Major:{shale/slate}, Minor{quartzite,marble,phyllite}

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]

Ordovician
443.8 - 485.4 Ma



ID: 3191763
Paleozoic sedimentary rocks

Age: Ordovician (443.8 - 485.4 Ma)

Lithology: Sedimentary 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 Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

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Belot, Victor R. (1978) Guide des minéraux, coquillages et fossiles: où les trouver en France, comment les reconnaître et les collectionner (Guides Horay). Pierre Horay (Ed.), 224 pp.
Lukas, Yann (1978) Roches et minéraux de Bretagne. Editions Ouest-France, 33 pp. [p. 15.]
Pillard, F., Chauris, L., and Laforêt, C. (1985) Inventaire minéralogique de la France, 13, 106-111. Ed. B.R.G.M.
Pochon, A., Gloaguen, E., Branquet, Y., Poujol, M., Ruffet, G., Boiron, M.-C., Boulvais, P., Gumiaux, C., Cagnard, F., Guazou, F., and Gapais, D. (2018) Variscan Sb-Au mineralization in Central Brittany (France): A new metallogenic model derived from the Le Semnon district. Ore Geology Reviews, 97, 109-142.

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