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Big Bertha Mine (Veta Grande Mine; Veta Grande claim; Crystal Caverns claim; Big Bertha Extension Mine), Middle Camp-Oro Fino District, Dome Rock Mts, La Paz Co., Arizona, USA

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Latitude & Longitude (WGS84): 33° 38' 25'' North , 114° 19' 0'' West
Latitude & Longitude (decimal): 33.64028,-114.31667
GeoHash:G#: 9myxqsj0u
Locality type:Mine
Köppen climate type:BWh : Hot deserts climate

A quartz occurrence located in the SW¼ sec. 34, T4N, R20W, about 5 miles SW of Quartzsite (not Quartzite).

Mineralization is quartz crystals in fissures in highly altered schists.

Alternative Label Names

This is a list of additional names that have been recorded for mineral labels associated with this locality in the minID database. This may include previous versions of the locality name hierarchy from, data entry errors, and it may also include unconfirmed sublocality names or other names that can only be matched to this level.

Big Bertha minr, Middle Camp-Oro Fine District, Dome Rock Mts., La Paz Co., Arizona
Big Berhta Mine, Dome Rock Mnts, La PazCo, Arizona, USA

Regions containing this locality

Sonoran Desert, North America

Desert - 1,136 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

4 valid minerals.

Detailed Mineral List:

Formula: Fe2O3
Habit: High quality crystals to 6.5 cm diameter; some twinned
Description: Crystals with quartz crystals, mirror bright & some twinned.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 246; Sprunger, M. (1980), Hematite from the Dome Rock Mts near Quartzsite, AZ, Min.Rec.: 11: 227-229.
Formula: Al2Si4O10(OH)2
Habit: Tufts & sprays
Colour: Pale green
Description: Well-crystallized on quartz & hematite.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 345.
Formula: SiO2
Description: Crystals with hematite.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 246, 345; Sprunger (1980); Galbraith. F.W. & D.J. Brennan (1959), Minerals of AZ: 93.
Formula: Al13Si5O20(OH,F)18Cl
Habit: Crystals to 2 cm on an edge.
Colour: Buff-colored
Description: Transparent crystals.
Reference: Galbraith. F.W. & D.J. Brennan (1959), Minerals of AZ: 93; Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 432; Wilson, W.E. (1986), What's new in minerals, Min.Rec.: 17: 210, 404-405.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Group 9 - Silicates

List of minerals arranged by Dana 8th Edition classification

Group 57 - SOROSILICATES Si3O10 Groups and Larger Noncyclic Groups
Insular Si3O10 and Larger Noncyclic Groups with [Si5O16] groups
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si

List of minerals for each chemical element

H PyrophylliteAl2Si4O10(OH)2
H ZunyiteAl13Si5O20(OH,F)18Cl
O HematiteFe2O3
O PyrophylliteAl2Si4O10(OH)2
O QuartzSiO2
O ZunyiteAl13Si5O20(OH,F)18Cl
F ZunyiteAl13Si5O20(OH,F)18Cl
Al PyrophylliteAl2Si4O10(OH)2
Al ZunyiteAl13Si5O20(OH,F)18Cl
Si PyrophylliteAl2Si4O10(OH)2
Si QuartzSiO2
Si ZunyiteAl13Si5O20(OH,F)18Cl
Cl ZunyiteAl13Si5O20(OH,F)18Cl
Fe HematiteFe2O3

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

Quaternary - Miocene
0 - 23.03 Ma

ID: 3185380
Cenozoic sedimentary rocks

Age: Cenozoic (0 - 23.03 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Oxfordian - Hettangian
157.3 - 201.3 Ma

ID: 2847766
Jurassic volcanic rocks

Age: Jurassic (157.3 - 201.3 Ma)

Stratigraphic Name: Ali Molina Formation; Topawa Group; Mount Wrightson Formation; Canelo Hills Volcanics; Cobre Ridge Tuff; Black Rock volcanics; Planet Volcanics

Description: Massive quartz-feldspar porphyry, generally interpreted as thick, welded rhyolitic tuffs, with locally abundant lava, and sandstone and conglomerate derived from volcanic rocks. Rare eolian quartzite units are interbedded in southern Arizona. Includes Ali Molina Formation, Mount Wrightson Formation, part of the Canelo Hills Volcanics, Cobre Ridge tuff, Black Rock volcanics, Planet Volcanics, and equivalent rocks. (160-200 Ma)

Comments: The Jurassic quartz porphyry, Ali Molina, Mt Wrightson, Cobre Ridge, Black Rock volcanics, Planet Volcanics. Original map source: Arizona Geological Survey, DI-8 Geologic Map of Arizona, Digital Spatial data for the Geologic Map of Arizona, v. 3.0, edited by S.M. Richard and S.M. Kneale, 2002, 10 p., 2 DOS HD disks. Arc/INFO export file (.e00) format, scale 1:1,000,000.

Lithology: Major:{rhyolite,sandstone,conglomerate}, Minor:{quartzite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Galbraith. F.W. & D.J. Brennan (1959), Minerals of Arizona: 93.
Sprunger, M. (1980), Hematite from the Dome Rock Mountains near Quartzsite, Arizona, Mineralogical Record: 11: 227-229.
Wilson, W.E. (1986), What's new in minerals, Mineralogical Record: 17: 210, 212, 404-405.
Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 246, 345, 432.
MRDS database Dep. ID file #10065032, MRDS ID #TC40021; and, Dep. ID #10234939, MAS ID #0040120175.
Arizona Bureau of Mines file data.

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