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:
District Of Columbia (Washington D.C.), USA

mindat Locality ID: 23732
mindat URL: http://www.mindat.org/loc-23732.html

Tectonic Settings:

Total number of sublocalities beneath "District Of Columbia (Washington D.C.), USA": 5
Total number of bottom-level sublocalities: 4

Number of Child Localities: 3
Child Localities:
Constitution Avenue
NW Washington
Waterworks Tunnel

Latitude: 38°55'8"N
Longitude: 77°2'4"W
Decimal Degree (lat, lon): 38.918888888889,-77.034444444444

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.

Allophane	Amorphous	Amphibole	Analcime	Andalusite	Aragonite	Calcite	Chlorite	Clay	Copper
Corundum	Diaspore	Epidote	Lepidocrocite	Marcasite	Mica	None	Not in a structural group	Pyrite	Quartz
Rocksalt	Rutile	Spinel	Staurolite	Talc	Titanite	Tourmaline	Vivianite

Actinolite ()*	Analcime ()*	Andalusite ()*	Calcite ()*	Cerussite ()*
Chrysocolla ()*	Clinochlore ()*	Galena ()*	Goethite ()*	Gold ()*
Ilmenite ()*	Kyanite ()*	Laumontite ()*	Lepidocrocite ()*	Magnetite ()*
Marcasite ()*	Muscovite ()*	Opal ()*	Piemontite ()*	Pyrite ()*
Quartz ()*	Rutile ()*	Schorl ()*	Staurolite ()*	Talc ()*
Titanite ()*	Tremolite ()*	Vivianite ()*

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 Au B C Ca Cu Fe H K Mg Mn Na O P Pb S Si Ti

Elements from minerals reported directly at this locality: Al B C Ca Cu Fe H Mg Mn Na O Pb S Si Ti

Structural Groups for minerals in this locality:
Allophane Amorphous Amphibole Analcime Andalusite Aragonite Calcite Chlorite Clay Copper
Corundum Diaspore Epidote Lepidocrocite Marcasite Mica None Not in a structural group Pyrite Quartz
Rocksalt Rutile Spinel Staurolite Talc Titanite Tourmaline Vivianite

28 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂	1	199411	3419
Analcime ()*	Analcime	Na(AlSi₂O₆)·H₂O	0		1627
Andalusite ()*	Andalusite	Al₂SiO₅	1	199410	1310
Calcite ()*	Calcite	Ca(CO₃)	0		27770
Cerussite ()*	Aragonite	Pb(CO₃)	0		4979
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	0		3531
Clinochlore ()*	Chlorite Clay	Mg₅Al(AlSi₃O₁₀)(OH)₈	1	199412	1756
Galena ()*	Rocksalt	PbS	0		24243
Goethite ()*	Diaspore	FeO(OH)	1	199411	7437
Gold ()*	Copper	Au	1	199410	30554
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	0		5433
Kyanite ()*	Not in a structural group	Al₂OSiO₄	0		1507
Laumontite ()*	Not in a structural group	CaAl₂Si₄O₁₂·4H₂O	0		1271
Lepidocrocite ()*	Lepidocrocite	Fe³⁺O(OH)	0		581
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	1	199411	14899
Marcasite ()*	Marcasite	FeS₂	0		5674
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	2	199408,199410	17380
Opal ()*	Amorphous	SiO₂·nH₂O	0		2994
Piemontite ()*	Epidote	Ca₂(Al₂Mn³⁺)[Si₂O₇][SiO₄]O(OH)	0		260
Pyrite ()*	Pyrite	FeS₂	1	199411	39462
Quartz ()*	Quartz	SiO₂	1	199410	61156
Rutile ()*	Rutile	TiO₂	0		5614
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	0		2705
Staurolite ()*	Staurolite	Fe²⁺₂Al₉Si₄O₂₃(OH)	1	199410	978
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	1	199411	3337
Titanite ()*	Titanite	CaTi(SiO₄)O	0		4899
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂	0		2562
Vivianite ()*	Vivianite	Fe²⁺₃(PO₄)₂·8H₂O	1	199408	636

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...