(Last updated: 08.07.2021)
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Norsk versjon | ||||
| THE NATURAL STONE DATABASE | |||||
| Occurence 1133 - 606 Randa | |||||
| (Object Id: 9559) (Last updated: 08.07.2021) |
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| Location |
| County: | Rogaland | Municipality: | Hjelmeland (1133) |
| Map 1:50000: | Strand (1213-2) | Map 1:250000: | Sauda |
| Coordinate system: | EU89-UTM Zone 32 |
| East: | 328992 m. | North: | 6567282 m. |
| Longitude: | 6.0045880 | Latitude: | 59.2100420 |
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| Resource |
| Resource Type: | Slate and schist | Resource Subtype: | Quartzitic flagstone | |
| Brickstone(Y/N): |
| Importance |
| Raw material meaning: | Not Assessed (reg. 21.03.2017) |
| Resources and production |
| Activity: | Stone quarrying | Reserves: | ||
| Operating method: | Open pit mining | Historical production: |
Products |
| Commercial Name | Product description |
| Kvartsittskifer | Classification: Cleaved slabs | Colour: Grayish | |
| Play of colours : | Uniformity: Medium good | ||
| Lithology: | Grain size: |
Mineralogy: |
| Feldspar | Major mineral (>10%) | ||
| Quartz | Major mineral (>10%) | ||
| Muscovite | Subordinate mineral (1-10%) | ||
| Epidote | Subordinate mineral (1-10%) | ||
| Carbonate | Accessory mineral (<1%) |
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Operations |
| From - To | Activity | Comments | |
| 1900 | Regular production | Company/Institution :O. Vik/Randa |
Deposit rock |
| Lithology: | Quartzrich flagstone | Weathering colour: | Gray | |
| Genesis: | Sedimentary/metamorphic | Form: | Layer | |
| Main texture: | Schistose |
| Main grain size: | Fine - medium grained (<1mm - 3 mm) | Main alteration: | Epidotisation |
| Strike/Dip: | 243 / 27 | Direction: | ||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Period: |
| Province: | ||
| Geotec.unit: | ||
| Tectonic complex: | ||
| Igneous complex: |
| Group: | Formation: |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Not defined | Schistosity | Strike/Dip :243 / 27 |
Information(s) in free text format |
| Description |
| Helt nede ved sjøen vest for gården Randa finnes to mindre brudd. Det ble tatt ut heller og murstein. I 1975 startet grunneier et lite brudd nærmere gården og gikk samtidig til innkjøp av diamantsag. I bruddene er det tatt ut skifer fra flere ulike soner, men mektigheten er forholdsvis beskjeden. Spalten er noe uregelmessig og skiferen er sprø slik at den lett brytes istykker under spaltingen. På grunn av liten mengde synes smådrift å være mest hensiktsmessig. |
| Photo(s) from the Deposit area: |
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Bibliography: |
| From NGU's Reference Archive: |
| The fact sheet was created on 28.04.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |