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:
Somerville, Middlesex Co., Massachusetts, USA

mindat Locality ID: 22356
mindat URL: http://www.mindat.org/loc-22356.html

Tectonic Settings:

Total number of sublocalities beneath "Somerville, Middlesex Co., Massachusetts, USA": 6
Total number of bottom-level sublocalities: 6

Number of Child Localities: 6
Child Localities:
Granite Street Quarry (Milk Row Quarry)
Heath St. Quarry
Holland Street Quarry
Mystic River Quarries (Mystic Quarries)
Two Penny Brook Quarry
Winter Hill Quarry

Latitude: 42°23'30"N
Longitude: 71°6'33"W
Decimal Degree (lat, lon): 42.391666666667,-71.109166666667

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.

Brookite	Calcite	Chalcopyrite	Chlorite	Clay	Clinozoisite	Corundum	Epidote	Feldspar	Malachite
Mica	None	Not in a structural group	Prehnite	Pyrite	Pyroxene	Quartz	Rhodonite	Rutile	Sphalerite
Spinel	Stilpnomelane	Titanite	Zircon

Albite ()*	Anatase ()*	Anorthite ()*	Augite ()*	Babingtonite ()*
Brookite ()*	Calcite ()*	Chalcopyrite ()*	Clinochlore ()*	Epidote ()*
Graphite ()*	Ilmenite ()*	Laumontite ()*	Magnetite ()*	Malachite ()*
Microcline ()*	Muscovite ()*	Prehnite ()*	Pyrite ()*	Quartz ()*
Rutile ()*	Sphalerite ()*	Stilpnomelane ()*	Titanite ()*	Zircon ()*

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 C Ca Cu Fe H K Mg Na O S Si Ti Zn Zr

Elements from minerals reported directly at this locality: Al C Ca Cu Fe H K O Si Ti

Structural Groups for minerals in this locality:
Brookite Calcite Chalcopyrite Chlorite Clay Clinozoisite Corundum Epidote Feldspar Malachite
Mica None Not in a structural group Prehnite Pyrite Pyroxene Quartz Rhodonite Rutile Sphalerite
Spinel Stilpnomelane Titanite Zircon

25 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Albite ()*	Feldspar	Na(AlSi₃O₈)	3	219642,219643,219645	8803
Anatase ()*	Not in a structural group	TiO₂	3	219641,219642,219643	2162
Anorthite ()*	Feldspar	Ca(Al₂Si₂O₈)	0		1036
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	1	219640	2060
Babingtonite ()*	Rhodonite	Ca₂Fe²⁺Fe³⁺Si₅O₁₄(OH)	2	219640,219641	161
Brookite ()*	Brookite	TiO₂	3	219641,219642,219643	700
Calcite ()*	Calcite	Ca(CO₃)	4	219640,219642,219643,219645	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	1	219642	27198
Clinochlore ()*	Chlorite Clay	Mg₅Al(AlSi₃O₁₀)(OH)₈	1	219640	1756
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	1	219640	8173
Graphite ()*	None	C	0		2812
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	0		5433
Laumontite ()*	Not in a structural group	CaAl₂Si₄O₁₂·4H₂O	1	219640	1271
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	1	219640	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	0		12537
Microcline ()*	Feldspar	K(AlSi₃O₈)	0		4924
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	1	219643	17380
Prehnite ()*	Prehnite	Ca₂Al(Si₃Al)O₁₀(OH)₂	2	219640,219642	1898
Pyrite ()*	Pyrite	FeS₂	2	219643,219645	39462
Quartz ()*	Quartz	SiO₂	4	219640,219641,219642,219643	61156
Rutile ()*	Rutile	TiO₂	2	219641,219642	5614
Sphalerite ()*	Sphalerite	ZnS	1	219642	21482
Stilpnomelane ()*	Stilpnomelane Clay	(K,Ca,Na)(Fe,Mg,Al)₈(Si,Al)₁₂(O,OH)₃₆·nH₂O	1	219640	456
Titanite ()*	Titanite	CaTi(SiO₄)O	1	219642	4899
Zircon ()*	Zircon	Zr(SiO₄)	1	219643	5251

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...