Old Hag prospect #2, Van Dam Peak, Poway, San Diego County, California, USAi
| Regional Level Types | |
|---|---|
| Old Hag prospect #2 | - not defined - |
| Van Dam Peak | Peak |
| Poway | - not defined - |
| San Diego County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
32° 57' 52'' North , 117° 5' 3'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Rancho Penasquitos | 60,000 (2018) | 3.0km |
| Poway | 50,157 (2017) | 4.5km |
| Mira Mesa | 70,000 (2018) | 7.8km |
| Fairbanks Ranch | 3,148 (2011) | 10.2km |
| Sorrento Valley | 5,000 (2018) | 12.5km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Palomar Gem & Mineral Club | Escondido, California | 17km |
| El Cajon Valley Gem & Mineral Society | El Cajon, California | 22km |
| San Diego Gem and Mineral Society | San Diego, California | 29km |
| San Diego Lapidary Society | San Diego, California | 29km |
| Vista Gem & Mineral Society | Vista, California | 30km |
Overview:
The foothills and mountain area around Van Dam Peak, north of Los Peñasquitos Canyon in the easternmost portion of incorporated Poway, just inside the original San Diego Corporate Boundary (NW/4 NW/4 NW/4 Sec 15, Township 13S, Range 2W, San Bernardino Meridian).
Geology:
Pegmatite veins containing pockets of smoky quartz crystals occurring within gabbroic and granitic rocks.
Workings and Production:
Area is located at an elevation of 960' AMSL, on the western slope approx 500 feet west of mountain top marked 1080' elevation, in the Van Dam Peak mountain area just within the city limits of Poway, located E/NE from Granite Creek Road in the nearby community of Sabre Springs, San Diego. Reported small find of quartz crystals in 1990 by Michael Fender of Poway. The spot was discovered while hiking along the surface of a weathered pegmatite where it is had been further exposed by a prominent trail cut. Two "very old" trenches were noticed adjacent to the discovery site.
A small amount of smoky quartz crystal points and floaters were easily picked up, with several small tabular twinned crystals being recovered. Nearly all of the quartz crystals were a light gray to deep orangey brown color, most being covered with tiny dark reddish black tourmaline needles and/or containing needles and hair-like inclusions (var: tourmalinated quartz). Microcline crystals were produced that had a "dusting" of micro epidote (possibly clinozoisite), and associations of quartz and schorl.
Notes:
The area is located on private lands, most of which is set aside as open space and habitat mitigation for lands disturbed by suburban development. The City of Poway informs visitors that all natural resources are fully protected. This includes plants, wildlife, and all natural features. Off-trail travel is prohibited. Please don’t shortcut trails or travel cross-country. All federal, state, and local regulations are in force.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ 'Clinozoisite-Epidote Series' |
| ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| ⓘ Kaolinite Formula: Al2(Si2O5)(OH)4 |
| ⓘ Microcline Formula: K(AlSi3O8) |
| ⓘ Orthoclase Formula: K(AlSi3O8) |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Quartz var. Smoky Quartz Formula: SiO2 |
| ⓘ Schorl Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
| ⓘ 'Tourmaline' Formula: AD3G6 (T6O18)(BO3)3X3Z |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | var. Smoky Quartz | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| ⓘ | Schorl | 9.CK.05 | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
| ⓘ | Kaolinite | 9.ED.05 | Al2(Si2O5)(OH)4 |
| ⓘ | Microcline | 9.FA.30 | K(AlSi3O8) |
| ⓘ | Orthoclase | 9.FA.30 | K(AlSi3O8) |
| Unclassified | |||
| ⓘ | 'Tourmaline' | - | AD3G6 (T6O18)(BO3)3X3Z |
| ⓘ | 'Clinozoisite-Epidote Series' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| H | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| H | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| H | ⓘ Clinozoisite-Epidote Series | |
| B | Boron | |
| B | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| B | ⓘ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| O | Oxygen | |
| O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| O | ⓘ Microcline | K(AlSi3O8) |
| O | ⓘ Orthoclase | K(AlSi3O8) |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | ⓘ Quartz var. Smoky Quartz | SiO2 |
| O | ⓘ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| O | ⓘ Clinozoisite-Epidote Series | |
| Na | Sodium | |
| Na | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | Aluminium | |
| Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Al | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| Al | ⓘ Microcline | K(AlSi3O8) |
| Al | ⓘ Orthoclase | K(AlSi3O8) |
| Al | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | ⓘ Clinozoisite-Epidote Series | |
| Si | Silicon | |
| Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| Si | ⓘ Microcline | K(AlSi3O8) |
| Si | ⓘ Orthoclase | K(AlSi3O8) |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | ⓘ Quartz var. Smoky Quartz | SiO2 |
| Si | ⓘ Clinozoisite-Epidote Series | |
| K | Potassium | |
| K | ⓘ Microcline | K(AlSi3O8) |
| K | ⓘ Orthoclase | K(AlSi3O8) |
| Ca | Calcium | |
| Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Clinozoisite-Epidote Series | |
| Fe | Iron | |
| Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Fe | ⓘ Clinozoisite-Epidote Series | |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America Plate
- California BorderlandAccretionary Complex
- Franciscan DomainDomain
- Southern California Borderland BasinsBasin
- Vizcaino basinBasin
Pacific PlateTectonic Plate
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