Cwmorthin Quarry, Tanygrisiau, Ffestiniog, Gwynedd, Wales, UKi
| Regional Level Types | |
|---|---|
| Cwmorthin Quarry | Quarry |
| Tanygrisiau | - not defined - |
| Ffestiniog | Community |
| Gwynedd | County |
| Wales | Country |
| UK | Country |
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Latitude & Longitude (WGS84):
52° 59' 50'' North , 3° 57' 56'' West
Latitude & Longitude (decimal):
UK National Grid Reference:
SH681463
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Blaenau-Ffestiniog | 4,005 (2016) | 1.9km |
| Llan Ffestiniog | 864 (2017) | 5.0km |
| Penrhyndeudraeth | 1,546 (2017) | 9.8km |
| Trawsfynydd | 628 (2017) | 10.9km |
| Porthmadog | 2,981 (2017) | 13.4km |
Other/historical names associated with this locality:
Merionethshire
Old slate quarry workings that linked underground to Gloddfa Ganol (Oakley) Quarry; the slates are cut by various basic dykes and by tuff turbidite bands (known to the miners as "cherts") that run through the slate.
The minerals at Cwmorthin Quarry largely occur in small cavities in alpine-type veins within the "cherts". These contain quartz, anatase, synchysite and xenotime with minor albite, apatite, rutile, brookite, galena and pyrite also occurring. Elsewhere, pyrite occurs in direct contact with the slate and pyrrhotite has been found in small cavities in quartz.
Minerals at Cwmorthin Quarry are generally rare, and whilst quartz can occur to several cm, other minerals are generally much smaller, or microscopic in nature.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Albite Formula: Na(AlSi3O8) |
| ⓘ Anatase Formula: TiO2 |
| ⓘ 'Apatite' Formula: Ca5(PO4)3(Cl/F/OH) |
| ⓘ Brookite Formula: TiO2 |
| ⓘ Galena Formula: PbS |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Pyrrhotite Formula: Fe1-xS |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Rutile Formula: TiO2 |
| ⓘ Synchysite-(Ce) Formula: CaCe(CO3)2F |
| ⓘ Xenotime-(Y) Formula: Y(PO4) |
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Rutile | 4.DB.05 | TiO2 |
| ⓘ | Anatase | 4.DD.05 | TiO2 |
| ⓘ | Brookite | 4.DD.10 | TiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Synchysite-(Ce) | 5.BD.20c | CaCe(CO3)2F |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Xenotime-(Y) | 8.AD.35 | Y(PO4) |
| Group 9 - Silicates | |||
| ⓘ | Albite | 9.FA.35 | Na(AlSi3O8) |
| Unclassified | |||
| ⓘ | 'Apatite' | - | Ca5(PO4)3(Cl/F/OH) |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| C | Carbon | |
| C | ⓘ Synchysite-(Ce) | CaCe(CO3)2F |
| O | Oxygen | |
| O | ⓘ Albite | Na(AlSi3O8) |
| O | ⓘ Anatase | TiO2 |
| O | ⓘ Brookite | TiO2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Rutile | TiO2 |
| O | ⓘ Synchysite-(Ce) | CaCe(CO3)2F |
| O | ⓘ Xenotime-(Y) | Y(PO4) |
| O | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| F | Fluorine | |
| F | ⓘ Synchysite-(Ce) | CaCe(CO3)2F |
| F | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Na | Sodium | |
| Na | ⓘ Albite | Na(AlSi3O8) |
| Al | Aluminium | |
| Al | ⓘ Albite | Na(AlSi3O8) |
| Si | Silicon | |
| Si | ⓘ Albite | Na(AlSi3O8) |
| Si | ⓘ Quartz | SiO2 |
| P | Phosphorus | |
| P | ⓘ Xenotime-(Y) | Y(PO4) |
| P | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| S | Sulfur | |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Pyrrhotite | Fe1-xS |
| Cl | Chlorine | |
| Cl | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Ca | Calcium | |
| Ca | ⓘ Synchysite-(Ce) | CaCe(CO3)2F |
| Ca | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Ti | Titanium | |
| Ti | ⓘ Anatase | TiO2 |
| Ti | ⓘ Brookite | TiO2 |
| Ti | ⓘ Rutile | TiO2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
| Y | Yttrium | |
| Y | ⓘ Xenotime-(Y) | Y(PO4) |
| Ce | Cerium | |
| Ce | ⓘ Synchysite-(Ce) | CaCe(CO3)2F |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Regions, Features and Areas containing this locality
British and Irish IslesGroup of Islands
Eurasian PlateTectonic Plate
- AvaloniaVolcanic Arc
EuropeContinent
UK
- Wales
- Cambrian MountainsMountain Range
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Cwmorthin Quarry, Tanygrisiau, Ffestiniog, Gwynedd, Wales, UK