Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat Articles
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Milliau Island, Trébeurden, Côtes-d'Armor, Brittany, Francei
Regional Level Types
Milliau IslandIsland
Trébeurden- not defined -
Côtes-d'ArmorDepartment
BrittanyRegion
FranceCountry

This page is currently not sponsored. Click here to sponsor this page.
Key
Lock Map
Name(s) in local language(s):Île Milliau, Trébeurden, Côtes-d'Armor, Bretagne, France
Latitude & Longitude (WGS84): 48° 46' 4'' North , 3° 35' 43'' West
Latitude & Longitude (decimal): 48.76784,-3.59532
GeoHash:G#: gbtmqjvvr
Locality type:Island
Age:300 MY (for the granite intrusio Ma
Geologic Time:Pennsylvanian
Köppen climate type:Cfb : Temperate oceanic climate


An island on the coast of Trébeurden, only accessible at low tide (take care!). The northern part is formed by the "granite rose" (pink granit) of Ploumanac'h, and the southern part by sedimentary rocks of unknown age. These are varves, with a well developed layer structure. Near the contact, the felsic layers of the varves underwent contact metamorphosis, resulting in the forming of cordierite, andalousite and sillimanite.

Regions containing this locality

Eurasian PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


5 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:

Andalusite
Formula: Al2(SiO4)O
Reference: Pierrick Graviou "Géotourisme en Côtes-d'Armor", Société Géologique et Minéralogique de Bretagne, 2012, 96 pages Erik Vercammen collection and field observations
Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
Reference: Erik Vercammen collection and field observations
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Erik Vercammen field observation and collection
Quartz
Formula: SiO2
Reference: Chauris, L. (2014) Minéraux de Bretagne, Les Editions du Piat, 108.
Sillimanite
Formula: Al2(SiO4)O
Reference: Pierrick Graviou "Géotourisme en Côtes-d'Armor", Société Géologique et Minéralogique de Bretagne, 2012, 96 pages Erik Vercammen collection and field observations

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Group 9 - Silicates
Andalusite9.AF.10Al2(SiO4)O
Cordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
Sillimanite9.AF.05Al2(SiO4)O

List of minerals arranged by Dana 8th Edition classification

Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
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
Andalusite52.2.2b.1Al2(SiO4)O
Sillimanite52.2.2a.1Al2(SiO4)O
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with Al substituted rings
Cordierite61.2.1.1(Mg,Fe)2Al3(AlSi5O18)
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2

List of minerals for each chemical element

OOxygen
O Cordierite(Mg,Fe)2Al3(AlSi5O18)
O AndalusiteAl2(SiO4)O
O SillimaniteAl2(SiO4)O
O QuartzSiO2
O MagnetiteFe2+Fe23+O4
MgMagnesium
Mg Cordierite(Mg,Fe)2Al3(AlSi5O18)
AlAluminium
Al Cordierite(Mg,Fe)2Al3(AlSi5O18)
Al AndalusiteAl2(SiO4)O
Al SillimaniteAl2(SiO4)O
SiSilicon
Si Cordierite(Mg,Fe)2Al3(AlSi5O18)
Si AndalusiteAl2(SiO4)O
Si SillimaniteAl2(SiO4)O
Si QuartzSiO2
FeIron
Fe Cordierite(Mg,Fe)2Al3(AlSi5O18)
Fe MagnetiteFe2+Fe23+O4

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Pierrick Graviou "Géotourisme en Côtes-d'Armor", Société Géologique et Minéralogique de Bretagne, 2012, 96 pages


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.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: April 24, 2019 23:08:46 Page generated: February 21, 2019 17:56:14
Go to top of page