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:
Gloucester, Essex Co., Massachusetts, USA

Oldest recorded age at locality: 364.15
Youngest recorded age at locality: 350.45

mindat Locality ID: 22343
mindat URL: http://www.mindat.org/loc-22343.html

Tectonic Settings:

Total number of sublocalities beneath "Gloucester, Essex Co., Massachusetts, USA": 18
Total number of bottom-level sublocalities: 18

Number of Child Localities: 18
Child Localities:
Barker Brothers Quarry
Bass Rocks Area
Bay View Dark-Granite Prospect
Blackburn Circle Locality
Blood Ledge Quarry
Canney Quarry
Cape Ann Granite Company Quarry
Cheves Green Granite Quarry
Deep Pit Quarry
Devil's Rock Quarry
Lanesville
Lanesville Granite Company Quarry
Magnolia
Pomeroy Quarry
Railcut Hill
S. P. Andrews Quarry
State Route 128 Road Cut/Cherry Hill Area
Trumbull Granite Company Quarry

Latitude: 42°38'50"N
Longitude: 70°39'27"W
Decimal Degree (lat, lon): 42.647222222222,-70.6575

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.

Amorphous	Amphibole	Astrophyllite	Calcite	Cancrinite-sodalite	Chevkinite	Chloritoid	Clay	Clinozoisite	Corundum
Diaspore	Epidote	Feldspar	Fluorite	Kaolinite	Mica	Molybdenite	Nickeline	None	Olivine
Phenakite	Pyrite	Pyroxene	Quartz	Rocksalt	Rutile	Sodalite	Sphalerite	Spinel	Sulphur
Titanite	Tridymite	Zircon

Actinolite ()*	Aegirine ()*	Albite ()*	Annite ()*	Anorthite ()*
Astrophyllite ()*	Augite ()*	Calcite ()*	Chevkinite-(Ce) ()*	Chloritoid ()*
Danalite ()*	Epidote ()*	Fayalite ()*	Ferro-anthophyllite ()*	Ferro-hornblende ()*
Fluorite ()*	Galena ()*	Gedrite ()*	Goethite ()*	Grunerite ()*
Halite ()*	Hastingsite ()*	Hedenbergite ()*	Hematite ()*	Ilmenite ()*
Kaolinite ()*	Magnetite ()*	Microcline ()*	Molybdenite ()*	Muscovite ()*
Nepheline ()*	Opal ()*	Orthoclase ()*	Phenakite ()*	Pigeonite ()*
Pyrite ()*	Pyrrhotite ()*	Quartz ()*	Rhodochrosite ()*	Riebeckite ()*
Rutile ()*	Siderite ()*	Sphalerite ()*	Sulphur ()*	Thorite ()*
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 Be C Ca Ce Cl F Fe H K Mg Mn Mo Na O Pb S Si Th Ti Zn Zr

Elements from minerals reported directly at this locality: Al Be Ca Ce Fe H K Mg Na O S Si Ti

Structural Groups for minerals in this locality:
Amorphous Amphibole Astrophyllite Calcite Cancrinite-sodalite Chevkinite Chloritoid Clay Clinozoisite Corundum
Diaspore Epidote Feldspar Fluorite Kaolinite Mica Molybdenite Nickeline None Olivine
Phenakite Pyrite Pyroxene Quartz Rocksalt Rutile Sodalite Sphalerite Spinel Sulphur
Titanite Tridymite Zircon

47 IMA Minerals at location:

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
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂	364.15	350.45	0		3419
Aegirine ()*	Pyroxene	NaFe³⁺Si₂O₆	364.15	350.45	2	219323,219324	1022
Albite ()*	Feldspar	Na(AlSi₃O₈)	364.15	350.45	6	219324,219325,219328,219334,219335,219337	8803
Annite ()*	Mica Clay	KFe²⁺₃(AlSi₃O₁₀)(OH)₂	364.15	350.45	3	219324,219335,219336	356
Anorthite ()*	Feldspar	Ca(Al₂Si₂O₈)	364.15	350.45	0		1036
Astrophyllite ()*	Astrophyllite	K₂NaFe²⁺₇Ti₂(Si₄O₁₂)₂O₂(OH)₄F	364.15	350.45	1	219324	161
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆			1	219333	2060
Calcite ()*	Calcite	Ca(CO₃)			2	219323,219328	27770
Chevkinite-(Ce) ()*	Chevkinite	Ce₄(Ti,Fe²⁺,Fe³⁺)₅O₈(Si₂O₇)₂	364.15	350.45	0		89
Chloritoid ()*	Chloritoid	Fe²⁺Al₂O(SiO₄)(OH)₂	364.15	350.45	0		376
Danalite ()*	Cancrinite-sodalite Sodalite	Be₃Fe²⁺₄(SiO₄)₃S	364.15	350.45	3	219324,219334,219335	58
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	364.15	350.45	0		8173
Fayalite ()*	Olivine	Fe²⁺₂(SiO₄)			1	219335	371
Ferro-anthophyllite ()*	Amphibole	Fe²⁺₂Fe²⁺₅Si₈O₂₂(OH)₂	364.15	350.45	0		5
Ferro-hornblende ()*	Amphibole	Ca₂(Fe²⁺₄Al)(Si₇Al)O₂₂(OH)₂	364.15	350.45	0		271
Fluorite ()*	Fluorite	CaF₂	364.15	350.45	4	219323,219324,219335,219337	9617
Galena ()*	Rocksalt	PbS	364.15	350.45	2	219324,219335	24243
Gedrite ()*	Amphibole	Mg₂(Mg₃Al₂)(Si₆Al₂)O₂₂(OH)₂	364.15	350.45	0		178
Goethite ()*	Diaspore	FeO(OH)			1	219335	7437
Grunerite ()*	Amphibole	Fe²⁺₂Fe²⁺₅Si₈O₂₂(OH)₂	364.15	350.45	1	219324	223
Halite ()*	Rocksalt	NaCl			1	219322	1398
Hastingsite ()*	Amphibole	NaCa₂(Fe²⁺₄Fe³⁺)(Si₆Al₂)O₂₂(OH)₂	364.15	350.45	0		209
Hedenbergite ()*	Pyroxene	CaFe²⁺Si₂O₆	364.15	350.45	0		741
Hematite ()*	Corundum	Fe₂O₃	364.15	350.45	2	219324,219335	14640
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	364.15	350.45	0		5433
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	364.15	350.45	0		5591
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	364.15	350.45	5	219323,219324,219325,219328,219330	14899
Microcline ()*	Feldspar	K(AlSi₃O₈)	364.15	350.45	8	219323,219324,219325,219328,219330,219334,219335,219337	4924
Molybdenite ()*	Molybdenite	MoS₂	364.15	350.45	2	219324,219334	5800
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	364.15	350.45	1	219324	17380
Nepheline ()*	Tridymite	Na₃K(Al₄Si₄O₁₆)	364.15	350.45	0		884
Opal ()*	Amorphous	SiO₂·nH₂O	364.15	350.45	3	219324,219335,219337	2994
Orthoclase ()*	Feldspar	K(AlSi₃O₈)	364.15	350.45	0		2349
Phenakite ()*	Phenakite	Be₂(SiO₄)	364.15	350.45	0		326
Pigeonite ()*	Pyroxene	(Mg,Fe,Ca)₂Si₂O₆	364.15	350.45	0		303
Pyrite ()*	Pyrite	FeS₂	364.15	350.45	2	219324,219337	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	364.15	350.45	0		9056
Quartz ()*	Quartz	SiO₂	364.15	350.45	8	219323,219324,219325,219328,219330,219334,219335,219337	61156
Rhodochrosite ()*	Calcite	Mn(CO₃)			1	219337	1711
Riebeckite ()*	Amphibole	Na₂(Fe²⁺₃Fe³⁺₂)Si₈O₂₂(OH)₂	364.15	350.45	3	219323,219324,219335	375
Rutile ()*	Rutile	TiO₂	364.15	350.45	2	219324,219337	5614
Siderite ()*	Calcite	Fe(CO₃)	364.15	350.45	4	219324,219334,219335,219337	6417
Sphalerite ()*	Sphalerite	ZnS	364.15	350.45	1	219324	21482
Sulphur ()*	Sulphur	S	364.15	350.45	1	219324	2045
Thorite ()*	Zircon	Th(SiO₄)	364.15	350.45	1	219324	1006
Titanite ()*	Titanite	CaTi(SiO₄)O			1	219333	4899
Zircon ()*	Zircon	Zr(SiO₄)	364.15	350.45	6	219323,219324,219325,219328,219330,219335	5251

2 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
	USGS-Rb-Sr-01308	350.45	350.45	350.45	Rb-Sr	initial age disturbed by weathering		whole rock							206529	Blackburn Circle Locality, Gloucester, Essex Co., Massachusetts, USA		USGS-Rb-Sr		USGS-Rb-Sr
	USGS-Rb-Sr-01309	364.15	364.15	364.15	Rb-Sr	initial age disturbed by weathering		whole rock							206529	Blackburn Circle Locality, Gloucester, Essex Co., Massachusetts, USA		USGS-Rb-Sr		USGS-Rb-Sr

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...