Monzogranite from
Foggintor Quarry, Princetown, Dartmoor Forest, West Devon, Devon, England, UK
| Locality type: | Quarry | |
| Classification | ||
|---|---|---|
| Type: | Monzogranite | |
| Comments: | The primary rock-type in this part of Dartmoor is identified broadly as a biotite monzogranite (previously termed adamellite). The texture varies between a fine granitic texture (with anhedral feldspars to about 6mm) through to a coarse texture (with anhedral feldspars to 25mm). Feldpar porphyroblasts are rarely if ever seen at Foggintor Quarry. Small miarolitic voids are seen in some parts of the quarry - either as stringers of voids or as pods of slightly porous granite. Late stage tourmalines are associated with these zones, although areas of very late stage greisenisation - characterised by schorl-balls, schorl veins and kaolinisation - are not uncommon. Fluorite is often associated with the greisenising fluids. The pluton emplacement is generally placed around 280Ma. | |
| Confirmation | ||
| Validity: | Believed Valid | |
| Data | ||
| Mineral Data: | Click here to view Monzogranite data | |
| Locality Data: | Click here to view Foggintor Quarry, Princetown, Dartmoor Forest, West Devon, Devon, England, UK | |
| Data Identifiers | ||
| Mindat Occurrence Record ID: | 1103276 | |
| Long-form Identifier: | 1:3:1103276:8 | |
| GUID (UUID V4): | 0a65abc5-4d84-4cbe-822c-e5e9d24b5de0 | |
| References | ||
