Kofa Mountains, Arizona, USAi
Regional Level Types | |
---|---|
Kofa Mountains | Mountain Range |
Arizona | State |
USA | Country |
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Latitude & Longitude (WGS84):
33° North , 113° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~36km
Type:
KΓΆppen climate type:
Mindat Locality ID:
33607
Long-form identifier:
mindat:1:2:33607:8
GUID (UUID V4):
4b517883-fbd3-4a35-88c1-e33883096f53
Other/historical names associated with this locality:
S.H. Mountains; Stone House Mountains
A mountain range located 20 miles SE of Quartzsite and NE of the Castle Dome Moutnains. The alternate name of S.H. Mountains which allegedly stands for 'Stone House.'
This is an isolated mountainous area in the central part of Yuma County. They cover an area of approximately 200 square miles are are surrounded by broad, gently-aggraded plains that separate them from other detached mountains. The higher summits rise probably 2,000 feet above the surrounding plains.
These mountains are composed of extrusive igneous rocks which rest on an eroded surface of much older rocks. These older rocks are exposed in low foothills in the northern and southern parts of the mountainous area. The volcanic rocks are probably of tertiary and Quaternary age. The older rocks consist of metamorphosed sediments with associated pegmatites, thought to be of Precambrian age, intruded by granite and dike rocks of probable Mesozoic age. These rocks are intricated dissected into flat-topped mesas of small extent or into jagged spires and other fantastic erosional forms.
Mineralization is Au-Cu-Pb deposits that occur in certain fault zones. The bulk of these mountains consists of a gently Northward dipping block of Tertiary rhyolites, andesites and tuffs, capped by basalts, that rises to more than 4,000 feet above sea level, or 2,500 feet above the adjacent plains. Minor areas of schist, granite, and shales are exposed at the base of the volcanics. The granite is of interest since it contains copper deposits. Extensive faulting and fracturing have affected all of the rocks, particularly those of the pre-lava age.
The Kofa Mountains lie principally in Yuma County. Their northern end lies in La Paz County.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
Mineral list contains entries from the region specified including sub-localities3 valid minerals.
Detailed Mineral List:
β Gold Formula: Au |
β Quartz Formula: SiO2 Description: Occurs lining geodes in rhyolite. |
β Quartz var. Agate References: |
β Quartz var. Chalcedony Formula: SiO2 Description: Occurs lining geodes in rhyolite. |
β Quartz var. Fire Agate Formula: SiO2 References: |
β Quartz var. Sardonyx Formula: SiO2 References: |
β Scheelite Formula: Ca(WO4) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
β | Gold | 1.AA.05 | Au |
Group 4 - Oxides and Hydroxides | |||
β | Quartz var. Agate | 4.DA.05 | SiO2 |
β | var. Chalcedony | 4.DA.05 | SiO2 |
β | 4.DA.05 | SiO2 | |
β | var. Fire Agate | 4.DA.05 | SiO2 |
β | var. Sardonyx | 4.DA.05 | SiO2 |
Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
β | Scheelite | 7.GA.05 | Ca(WO4) |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | β Quartz var. Chalcedony | SiO2 |
O | β Quartz | SiO2 |
O | β Scheelite | Ca(WO4) |
O | β Quartz var. Fire Agate | SiO2 |
O | β Quartz var. Sardonyx | SiO2 |
Si | Silicon | |
Si | β Quartz var. Chalcedony | SiO2 |
Si | β Quartz | SiO2 |
Si | β Quartz var. Fire Agate | SiO2 |
Si | β Quartz var. Sardonyx | SiO2 |
Ca | Calcium | |
Ca | β Scheelite | Ca(WO4) |
W | Tungsten | |
W | β Scheelite | Ca(WO4) |
Au | Gold | |
Au | β Gold | Au |
Localities in this Region
- Arizona
- Yuma County
Other Regions, Features and Areas that Intersect
North America
- Sonoran DesertDesert
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mojave DomainDomain
USA
- Arizona
- Alamo Springs Mining DistrictMining District
- Kofa National Wildlife RefugeWildlife Refuge
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