Hegrestad Quarry (Edelsplitt), Hellvik, Eigersund, Rogaland, Norwayi
| Regional Level Types | |
|---|---|
| Hegrestad Quarry (Edelsplitt) | Quarry (Active) |
| Hellvik | Village |
| Eigersund | Municipality |
| Rogaland | County |
| Norway | Country |
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Latitude & Longitude (WGS84):
58° 30' 6'' North , 5° 55' 16'' East
Latitude & Longitude (decimal):
Type:
Quarry (Active) - last checked 2018
Age:
1000 to 541 ± 1.0 Ma
Geologic Time:
Reference for age:
Geological Survey of Norway. The Industrial Mineral Database. Deposit Area 1101 - 306, Hegrestad
Köppen climate type:
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 |
|---|---|---|
| Sandnes Steinklubb | Sandnes | 42km |
Other/historical names associated with this locality:
Edelsplitt
Other Languages:
Norwegian:
Hegrestad steinbrudd, Hellvik, Eigersund, Rogaland, Norge
This quarry, and the Hellvik quarry have a total annual production of 300.000 tons of white anorthosite. The produce is used as an additive to ceramic tiles and as crushed stone for various purposes. The quarry is operated by KS Norwegian Edelsplitt, whereas the quarry on the other side of the road (West of the RV44) is operated by Hellviksplitt AS. Both companies have a shared sales organization, KS Norwegian Edelsplitt. The quarries were opened in the 1960s and are still (2015) in operation and have large remaining reserves (NGU database).
The rock is a white anorthosite with inclusions of a green and white spotted rock of undefined origin, but probably contains epidote and prehnite. The white colour is due to hydrothermal alteration of the anorthosite. The white anorthosite constitutes 80-85% of the rock.
These deposits should not be confused with the deposits of labradorescent anorthosite a few km further west.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
1 valid mineral.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| ⓘ 'Mica Group' |
| ⓘ 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 9 - Silicates | |||
|---|---|---|---|
| ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Unclassified | |||
| ⓘ | 'Mica Group' | - | |
| ⓘ | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | Oxygen | |
| O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Na | Sodium | |
| Na | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Al | Aluminium | |
| Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Al | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | Silicon | |
| Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Ca | Calcium | |
| Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Fe | Iron | |
| Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Other Databases
| Link to Geological Survey of Norway: | 8028 |
|---|
Other Regions, Features and Areas containing this locality
Eurasian PlateTectonic Plate
- Baltic Shield
- Sveconorwegian BeltShield
EuropeContinent
ScandinaviaRegion
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