Ridgeview quarry, Umbilo Valley, Cato Manor, Durban, eThekwini District, KwaZulu-Natal Province, South Africa
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Co-ordinates: 28 deg. 47'S, 30deg. 59'E
The quarry works Phanerozoic tillite (Dwyka series, Karroo System). Several small fissures carrying crystallised minerals are present, but the most productive area (leached of calcite) is a pyrite-rich breccia/fracture zone (coursing roughly N/S). The pyrite is unstable and yields ephemeral sulphates.
14 entries listed. 11 valid minerals.
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