Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.

Locality Name:
Saint-Malo, Ille-et-Vilaine, Brittany, France

Oldest recorded age at locality: 0.004
Youngest recorded age at locality: 0.003

mindat Locality ID: 245176
mindat URL: http://www.mindat.org/loc-245176.html

Tectonic Settings:

Total number of sublocalities beneath "Saint-Malo, Ille-et-Vilaine, Brittany, France": 6
Total number of bottom-level sublocalities: 6

Number of Child Localities: 6
Child Localities:
Baguer-Pican
Cézembre Island
Fort National
La Montagne-Saint-Joseph
Mont-Dol
Salt Marsh

Latitude: 48°37'38"N
Longitude: 1°55'24"W
Decimal Degree (lat, lon): 48.627222222222,-1.9233333333333

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
	This mineral's age has not yet been recorded.

Alunite	Clay	Diaspore	Gypsum	Hydrotalcite	Mica	None	Pyrite	Quartz	Rocksalt
Tourmaline

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al B C Ca Fe H K Na O Pb S Si

Elements from minerals reported directly at this locality: Pb S

Structural Groups for minerals in this locality:
Alunite Clay Diaspore Gypsum Hydrotalcite Mica None Pyrite Quartz Rocksalt
Tourmaline

11 IMA Minerals at location:

Galena ()*	Goethite ()*	Graphite ()*	Gypsum ()*	Jarosite ()*
Mössbauerite ()*	Muscovite ()*	Pyrite ()*	Quartz ()*	Schorl ()*
Trébeurdenite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Galena ()*	Rocksalt	PbS	0.004	0.003	0		24243
Goethite ()*	Diaspore	FeO(OH)	0.004	0.003	1	53181	7437
Graphite ()*	None	C	0.004	0.003	1	53182	2812
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O	0.004	0.003	1	53181	6890
Jarosite ()*	Alunite	KFe³⁺₃(SO₄)₂(OH)₆	0.004	0.003	1	53181	2228
Mössbauerite ()*	Hydrotalcite	Fe³⁺₆O₄(OH)₈(CO₃)·3H₂O	0.004	0.003	1	53183	8
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	0.004	0.003	1	53179	17380
Pyrite ()*	Pyrite	FeS₂	0.004	0.003	1	53181	39462
Quartz ()*	Quartz	SiO₂	0.004	0.003	2	53180,53181	61156
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	0.004	0.003	1	53180	2705
Trébeurdenite ()*	Hydrotalcite	Fe²⁺₂Fe³⁺₄O₂(OH)₁₀(CO₃)·3H₂O	0.004	0.003	1	53183	8

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Michelle_385	Trébeurdenite and mössbauerite are found within the clay "gleysol" layer in the beaches and bays of North France. The characteristic blue color and halophyte fossil roots indicate the layer that was once a salt marsh, likely when sea levels were lower.

1 Ages assigned to this locality:

	Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	Michelle_385	0.004	0.003	0.003-0.004	stratigraphy	Age of maritime salt marshes					Yes		Mossbauerite, Trebeurdenite		282038	Mont Saint-Michel Bay, Ille-et-Vilaine, Brittany, France	Mont Saint-Michel Bay	Génin et al. (2012)	10.1007/s10751-011-0500-8	HI204_71	Age of maritime salt marshes

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...