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:
Babson Farm Quarry, Rockport Granite Company Quarries, Rockport, Essex Co., Massachusetts, USA

Oldest recorded age at locality: 457
Youngest recorded age at locality: 418

mindat Locality ID: 47041
mindat URL: http://www.mindat.org/loc-47041.html

Tectonic Settings:

Total number of sublocalities beneath "Babson Farm Quarry, Rockport Granite Company Quarries, Rockport, Essex Co., Massachusetts, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 42°41'23"N
Longitude: 70°37'56"W
Decimal Degree (lat, lon): 42.689722222222,-70.632222222222

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.

Corundum	Feldspar	None	Olivine	Pyroxene	Quartz	Spinel	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 Ca Fe K O Si Ti Zr

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

Structural Groups for minerals in this locality:
Corundum Feldspar None Olivine Pyroxene Quartz Spinel Zircon

8 IMA Minerals at location:

Fayalite ()*	Hedenbergite ()*	Hematite ()*	Ilmenite ()*	Magnetite ()*
Microcline ()*	Quartz ()*	Zircon ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Fayalite ()*	Olivine	Fe²⁺₂(SiO₄)	457	418	371
Hedenbergite ()*	Pyroxene	CaFe²⁺Si₂O₆	457	418	741
Hematite ()*	Corundum	Fe₂O₃	457	418	14640
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	457	418	5433
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	457	418	14899
Microcline ()*	Feldspar	K(AlSi₃O₈)	457	418	4924
Quartz ()*	Quartz	SiO₂	457	418	61156
Zircon ()*	Zircon	Zr(SiO₄)	457	418	5251

5 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Source	Dated Mineral	MinDat Locality ID	Dated Locality (Max Age)	Reference	Reference ID
USGS-Rb-Sr-00934	431.82	419.82	425.82±6	Rb-Sr	age of intrusion	whole rock		47041	Babson Farm Quarry, Rockport Granite Company Quarries, Rockport, Essex Co., Massachusetts, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-00935	431.82	419.82	425.82±6	Rb-Sr	age of intrusion	whole rock		47041	Babson Farm Quarry, Rockport Granite Company Quarries, Rockport, Essex Co., Massachusetts, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-U-Th-Pb-00150_206_238	426	418	422±4	206_238		zircon	Zircon	47041	Babson Farm Quarry, Rockport Granite Company Quarries, Rockport, Essex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00150_207_206	457	445	451±6	207_206		zircon	Zircon	47041	Babson Farm Quarry, Rockport Granite Company Quarries, Rockport, Essex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-00150_207_235	431	423	427±4	207_235		zircon	Zircon	47041	Babson Farm Quarry, Rockport Granite Company Quarries, Rockport, Essex Co., Massachusetts, USA	USGS-U-Th-Pb	USGS-U-Th-Pb

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...