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:
Mayes Pasture, Llano Co., Texas, USA

Oldest recorded age at locality: 1121.37
Youngest recorded age at locality: 964.22

mindat Locality ID: 274396
mindat URL: http://www.mindat.org/loc-274396.html

Tectonic Settings:

Total number of sublocalities beneath "Mayes Pasture, Llano Co., Texas, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 30°51'10"N
Longitude: 98°39'8"W
Decimal Degree (lat, lon): 30.852777777778,-98.652222222222

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.

Malachite	None	Not in a structural group

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: C Cu H O

Elements from minerals reported directly at this locality: C Cu H O

Structural Groups for minerals in this locality:
Malachite None Not in a structural group

2 IMA Minerals at location:

Azurite ()*	Malachite ()*

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
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂	1121.37	964.22	0		5509
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	1121.37	964.22	0		12537

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-04860	1121.37	1071.37	1096.37±25	Rb-Sr	age of metamorphic crystallization	whole rock		274396	Mayes Pasture, Llano Co., Texas, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-04861	964.22	964.22	964.22	Rb-Sr	age of later metamorphism	muscovite	Muscovite	274396	Mayes Pasture, Llano Co., Texas, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-04862	1019.67	1019.67	1019.67	Rb-Sr	age of later metamorphism	microcline	Microcline	274396	Mayes Pasture, Llano Co., Texas, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-04863	1019.67	1019.67	1019.67	Rb-Sr	age of later metamorphism	plagioclase		274396	Mayes Pasture, Llano Co., Texas, USA	USGS-Rb-Sr	USGS-Rb-Sr
USGS-Rb-Sr-04864	1019.67	1019.67	1019.67	Rb-Sr	age of later metamorphism	whole rock		274396	Mayes Pasture, Llano Co., Texas, USA	USGS-Rb-Sr	USGS-Rb-Sr

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...