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Średnica pegmatite, Gruszków, Gmina Mysłakowice, Karkonosze County, Lower Silesian Voivodeship, Polandi
| Regional Level Types | |
|---|---|
| Średnica pegmatite | Outcrop |
| Gruszków | Village |
| Gmina Mysłakowice | Gmina |
| Karkonosze County | County |
| Lower Silesian Voivodeship | Voivodeship |
| Poland | Country |
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Latitude & Longitude (WGS84):
50° 48' 44'' North , 15° 51' 26'' East
Latitude & Longitude (decimal):
Type:
Age:
358.9 ± 0.4 to 298.9 ± 0.15 Ma
Geologic Time:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Kowary | 11,834 (2010) | 2.6km |
| Mysłakowice | 5,100 (2016) | 6.4km |
| Karpacz | 4,979 (2011) | 8.2km |
| Janowice Wielkie | 2,100 (2010) | 8.4km |
| Sosnówka | 1,200 (2015) | 9.5km |
Other/historical names associated with this locality:
Mittelberg
Kozłowski, Matyszczak (2021):
Średnica Mt., eastern slope of the mountain, c. 200 m from the summit; typical ellipsoid pegmatite nest, 37 cm long, with lepidolite, epidote, chlorite, calcite and natrolite (?), two colorless fluorite cubes (3.6 and 4.4 mm in size) found between the rock crystals.
Note: Samples of pegmatites (Kozłowski, Matyszczak 2021) were collected in the years 1968–2006. GPS coordinates given by authors (15º51’27”E, 48º52’47”N) are completely wrong.
natrolite - probably wrong, visual (?) identification (laumontite or scolecite).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
4 valid minerals. 1 erroneous literature entry.
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:
| ⓘ Calcite Formula: CaCO3 |
| ⓘ 'Chlorite Group' |
| ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| ⓘ Fluorite Formula: CaF2 |
| ⓘ 'Lepidolite' |
| ⓘ Formula: Na2Al2Si3O10 · 2H2O Description: natrolite has never been found in the pegmatites of Lower Silesia, the authors did not present any results of confirming analyzes; relatively common zeolites with a similar appearance are laumontite and scolecite, described from the miarolitic pegmatites (note by K.Andrzejewski) |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Quartz var. Rock Crystal Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 3 - Halides | |||
|---|---|---|---|
| ⓘ | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | var. Rock Crystal | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| Group 9 - Silicates | |||
| ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| ⓘ | Natrolite ? | 9.GA.05 | Na2Al2Si3O10 · 2H2O |
| Unclassified | |||
| ⓘ | 'Chlorite Group' | - | |
| ⓘ | 'Lepidolite' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| H | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Quartz var. Rock Crystal | SiO2 |
| F | Fluorine | |
| F | ⓘ Fluorite | CaF2 |
| Na | Sodium | |
| Na | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| Al | Aluminium | |
| Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Al | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| Si | Silicon | |
| Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Natrolite | Na2Al2Si3O10 · 2H2O |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Quartz var. Rock Crystal | SiO2 |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Fluorite | CaF2 |
| Fe | Iron | |
| Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Other Regions, Features and Areas containing this locality
Czech Republic/Germany/Poland
- ⭔SilesiaRegion
Eurasian PlateTectonic Plate
- Saxo-Thuringian BeltOrogenic Belt
EuropeContinent
- Bohemian MassifMassif
- SudetesMountain Range
- Western SudetesMountain Range
- SudetesMountain Range
Poland
- Lower Silesian Voivodeship
- Rudawy Janowickie MountainsMountain Range
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