Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

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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:
Guilford Co., North Carolina, USA

mindat Locality ID: 23449
mindat URL: http://www.mindat.org/loc-23449.html

Tectonic Settings:

Total number of sublocalities beneath "Guilford Co., North Carolina, USA": 45
Total number of bottom-level sublocalities: 37

Number of Child Localities: 26
Child Localities:
Belews Lake Quarry
Central Rock Products Quarry
Charles Occurrence
Charlotte Belt
Clay Pit (MRDS - 10074687)
Clay Pit (MRDS - 10074688)
Cook Occurrence
Friendship
Greensboro
Guilford County Copper District
Guilford County Mines
Guilford Meteorite
Hicone Quarry
J. A. Kennett Prospect
J. F. Hughes Prospect
Jamestown
Lewis Occurrence
Mrs. Bernard H. Turner Prospect
Number 3 Mine (Pleasant Garden No. 3 Mine)
Oak Ridge
Pearman Quarry
Phoenix Mine
Plants & Mines No. 1 & 2 (Mines Numbers 1 And 2; Pleasant Garden Nos. 1 & 2 Mine)
Pomona
Stokesdale
Trueblood Occurrence

Latitude: 36°2'4"N
Longitude: 79°49'43"W
Decimal Degree (lat, lon): 36.034444444444,-79.828611111111

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	Amphibole	Arsenopyrite	Brochantite	Calcite	Chalcopyrite	Clay	Clinozoisite	Copper	Corundum
Covellite	Diaspore	Epidote	Feldspar	Garnet	Heulandite	Iron	Kaolinite	Malachite	Mica
Molybdenite	None	Not in a structural group	Prehnite	Pyrite	Quartz	Rocksalt	Rutile	Spinel	Talc
Titanite	Tourmaline

Actinolite ()*	Ankerite ()*	Arsenopyrite ()*	Azurite ()*	Bornite ()*
Brochantite ()*	Calcite ()*	Carlsbergite ()*	Chalcocite ()*	Chalcopyrite ()*
Chromite ()*	Chrysocolla ()*	Copper ()*	Corundum ()*	Covellite ()*
Cuprite ()*	Epidote ()*	Goethite ()*	Gold ()*	Graphite ()*
Hematite ()*	Heulandite-Ca ()*	Ilmenite ()*	Iron ()*	Kaolinite ()*
Kyanite ()*	Laumontite ()*	Magnetite ()*	Malachite ()*	Molybdenite ()*
Muscovite ()*	Orthoclase ()*	Phlogopite ()*	Prehnite ()*	Pseudomalachite ()*
Pyrite ()*	Quartz ()*	Romanèchite ()*	Rutile ()*	Schorl ()*
Schreibersite ()*	Siderite ()*	Sillimanite ()*	Spessartine ()*	Taenite ()*
Talc ()*	Titanite ()*

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 As Au B Ba C Ca Cr Cu Fe H K Mg Mn Mo N Na Ni O P S Si Ti

Elements from minerals reported directly at this locality: Al C Ca Cr Fe H Mg Mn Mo O S Si Ti

Structural Groups for minerals in this locality:
Allophane Amphibole Arsenopyrite Brochantite Calcite Chalcopyrite Clay Clinozoisite Copper Corundum
Covellite Diaspore Epidote Feldspar Garnet Heulandite Iron Kaolinite Malachite Mica
Molybdenite None Not in a structural group Prehnite Pyrite Quartz Rocksalt Rutile Spinel Talc
Titanite Tourmaline

47 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	250739	3419
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂	2	250750,250751	3092
Arsenopyrite ()*	Arsenopyrite	FeAsS	1	250751	9052
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂	1	250751	5509
Bornite ()*	None	Cu₅FeS₄	5	250749,250754,250757,250758,250759	5516
Brochantite ()*	Brochantite	Cu₄(SO₄)(OH)₆	2	250750,250751	1633
Calcite ()*	Calcite	Ca(CO₃)	5	250751,250754,250766,250776,250778	27770
Carlsbergite ()*	Rocksalt	CrN	1	250761	26
Chalcocite ()*	None	Cu₂S	6	250748,250754,250756,250757,250758,250759	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	10	250748,250749,250750,250751,250752,250754,250755,250756,250759,250773	27198
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	0		3902
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	1	250749	3531
Copper ()*	Copper	Cu	1	250752	3846
Corundum ()*	Corundum	Al₂O₃	0		1797
Covellite ()*	Covellite	CuS	4	250748,250757,250758,250773	4165
Cuprite ()*	Not in a structural group	Cu₂O	3	250748,250752,250759	2970
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	2	250750,250751	8173
Goethite ()*	Diaspore	FeO(OH)	1	250739	7437
Gold ()*	Copper	Au	12	250739,250749,250750,250751,250752,250755,250756,250757,250758,250759,250763,250764	30554
Graphite ()*	None	C	0		2812
Hematite ()*	Corundum	Fe₂O₃	9	250739,250749,250750,250751,250752,250754,250756,250757,250758	14640
Heulandite-Ca ()*	Heulandite	(Ca,Na,K)₅(Si₂₇Al₉)O₇₂·26H₂O	1	250766	246
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	2	250744,250756	5433
Iron ()*	Iron	Fe	1	250761	1089
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	0		5591
Kyanite ()*	Not in a structural group	Al₂OSiO₄	0		1507
Laumontite ()*	Not in a structural group	CaAl₂Si₄O₁₂·4H₂O	4	250736,250766,250776,250778	1271
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	9	250742,250744,250749,250755,250756,250757,250758,250768,250779	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	7	250748,250749,250750,250751,250752,250755,250759	12537
Molybdenite ()*	Molybdenite	MoS₂	0		5800
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	8	250748,250749,250750,250751,250752,250754,250755,250756	17380
Orthoclase ()*	Feldspar	K(AlSi₃O₈)	1	250751	2349
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂	2	250750,250752	2273
Prehnite ()*	Prehnite	Ca₂Al(Si₃Al)O₁₀(OH)₂	0		1898
Pseudomalachite ()*	None	Cu₅(PO₄)₂(OH)₄	1	250756	369
Pyrite ()*	Pyrite	FeS₂	9	250748,250749,250750,250751,250752,250754,250755,250756,250759	39462
Quartz ()*	Quartz	SiO₂	12	250739,250748,250749,250750,250751,250752,250754,250755,250757,250758,250759,250766	61156
Romanèchite ()*	None	(Ba,H₂O)₂(Mn⁴⁺,Mn³⁺)₅O₁₀	1	250739	312
Rutile ()*	Rutile	TiO₂	1	250742	5614
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	1	250751	2705
Schreibersite ()*	None	(Fe,Ni)₃P	1	250761	374
Siderite ()*	Calcite	Fe(CO₃)	10	250748,250749,250750,250751,250752,250754,250755,250757,250758,250759	6417
Sillimanite ()*	Not in a structural group	Al₂SiO₅	0		1516
Spessartine ()*	Garnet	Mn²⁺₃Al₂(SiO₄)₃	0		1214
Taenite ()*	None	(Ni,Fe)	1	250761	703
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	0		3337
Titanite ()*	Titanite	CaTi(SiO₄)O	0		4899

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...