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Saint-Jean-du-Doigt beach alluvials, Saint-Jean-du-Doigt, Finistère, Brittany, France

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Name(s) in local language(s):Plage de Saint-Jean-du-Doigt, Saint-Jean-du-Doigt, Finistère, Bretagne, France
Latitude & Longitude (WGS84): 48° 42' 9'' North , 3° 46' 36'' West
Latitude & Longitude (decimal): 48.70250,-3.77694
GeoHash:G#: gbtm4418w
Locality type:Alluvials
Köppen climate type:Cfb : Temperate oceanic climate


Placer on the beach.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


7 valid minerals.

Detailed Mineral List:

'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Chauris L. (1982), A la recherche des placers littoraux : concentration de sables lourds sur les plages du Nord –Finistère (Massif Armoricain), 107ème congrès des sociétés savantes, Brest, sciences, fasc. III, p. 127 à 129.
Anatase
Formula: TiO2
Reference: Chauris L. (1982), A la recherche des placers littoraux : concentration de sables lourds sur les plages du Nord –Finistère (Massif Armoricain), 107ème congrès des sociétés savantes, Brest, sciences, fasc. III, p. 127 à 129.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Chauris L. (1982), A la recherche des placers littoraux : concentration de sables lourds sur les plages du Nord –Finistère (Massif Armoricain), 107ème congrès des sociétés savantes, Brest, sciences, fasc. III, p. 127 à 129.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Chauris L. (1982), A la recherche des placers littoraux : concentration de sables lourds sur les plages du Nord –Finistère (Massif Armoricain), 107ème congrès des sociétés savantes, Brest, sciences, fasc. III, p. 127 à 129.
Gypsum
Formula: CaSO4 · 2H2O
Reference: Chauris, L. (2014): Minéraux de Bretagne, Les Editions du Piat, 159.
Ilmenite
Formula: Fe2+TiO3
Reference: Chauris L. (1982), A la recherche des placers littoraux : concentration de sables lourds sur les plages du Nord –Finistère (Massif Armoricain), 107ème congrès des sociétés savantes, Brest, sciences, fasc. III, p. 127 à 129.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Chauris L. (1982), A la recherche des placers littoraux : concentration de sables lourds sur les plages du Nord –Finistère (Massif Armoricain), 107ème congrès des sociétés savantes, Brest, sciences, fasc. III, p. 127 à 129.
'Monazite'
Reference: Chauris L. (1982), A la recherche des placers littoraux : concentration de sables lourds sur les plages du Nord –Finistère (Massif Armoricain), 107ème congrès des sociétés savantes, Brest, sciences, fasc. III, p. 127 à 129.
Rutile
Formula: TiO2
Reference: Chauris L. (1982), A la recherche des placers littoraux : concentration de sables lourds sur les plages du Nord –Finistère (Massif Armoricain), 107ème congrès des sociétés savantes, Brest, sciences, fasc. III, p. 127 à 129.
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Chauris L. (1982), A la recherche des placers littoraux : concentration de sables lourds sur les plages du Nord –Finistère (Massif Armoricain), 107ème congrès des sociétés savantes, Brest, sciences, fasc. III, p. 127 à 129.
Zircon
Formula: Zr(SiO4)
Reference: Chauris L. (1982), A la recherche des placers littoraux : concentration de sables lourds sur les plages du Nord –Finistère (Massif Armoricain), 107ème congrès des sociétés savantes, Brest, sciences, fasc. III, p. 127 à 129.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
'Anatase'4.DD.05TiO2
'Ilmenite'4.CB.05Fe2+TiO3
'Magnetite'4.BB.05Fe2+Fe3+2O4
'Rutile'4.DB.05TiO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Gypsum'7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
'Epidote'9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
'Zircon'9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Garnet Group'-X3Z2(SiO4)3
'Monazite'-
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
AX2
Anatase4.4.4.1TiO2
Rutile4.4.1.1TiO2
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Garnet Group'-X3Z2(SiO4)3
'Monazite'-
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H GypsumCaSO4 · 2H2O
BBoron
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
OOxygen
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O AnataseTiO2
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O Garnet GroupX3Z2(SiO4)3
O GypsumCaSO4 · 2H2O
O IlmeniteFe2+TiO3
O MagnetiteFe2+Fe23+O4
O RutileTiO2
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O ZirconZr(SiO4)
FFluorine
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
AlAluminium
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
SiSilicon
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si Garnet GroupX3Z2(SiO4)3
Si ZirconZr(SiO4)
SSulfur
S GypsumCaSO4 · 2H2O
ClChlorine
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
CaCalcium
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca GypsumCaSO4 · 2H2O
TiTitanium
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Ti AnataseTiO2
Ti IlmeniteFe2+TiO3
Ti RutileTiO2
FeIron
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe IlmeniteFe2+TiO3
Fe MagnetiteFe2+Fe23+O4
ZrZirconium
Zr ZirconZr(SiO4)

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

Early Carboniferous
323.2 - 358.9 Ma



ID: 3144115
calc-alkaline mafic plutonism

Age: Mississippian (323.2 - 358.9 Ma)

Lithology: Major:{tonalite}, Minor{gabbro group,diorite}

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]

Neoproterozoic
541 - 1000 Ma



ID: 3188480
Neoproterozoic tectonic rocks

Age: Neoproterozoic (541 - 1000 Ma)

Lithology: Mudstone-carbonate-sandstone-conglomerate

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

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Lukas, Yann (1978) Roches et minéraux de Bretagne. Editions Ouest-France, 33 pp.
Chauris, L. (1982) À la recherche des placers littoraux: concentration de sables lourds sur les plages du Nord–Finistère (Massif Armoricain). 107ème congrès des sociétés savantes, Brest, sciences, fasc. III, 127-129.


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