Coocoran
The Coocoran-Lake Opal fields (ger .: Coocoran Lake Opal fields ) are located approximately 20 kilometers west of Lightning Ridge on Coocoran Lake in New South Wales , Australia .
There are 50 Coocoran opal fields ranging in size from 1 to 20 hectares , which are named. The fields were developed during the time of the Great Depression and from 1990 about 80 percent of the black opals were extracted there . The opals are mined at a depth of 6 to 30 meters, mainly between 15 and 20 meters. Above all, the so-called nobbies are obtained, which appear on the top of the clay lenses , which are covered by heavily weathered clayey-bound sandstone .
Web links
- mindat.org : Illustration of opals from the Coocoran opal fields
Individual evidence
- ↑ mindat.org : Coocoran Opal Fields, Lightning Ridge, Finch Co., New South Wales, Australia, in English, accessed February 18, 2012
- ↑ dpi.nsw.gov.au : Opal Fields surrounding Lightning Ridge , in English, accessed on February 18, 2012
Coordinates: 29 ° 25 ′ 41.6 ″ S , 147 ° 53 ′ 35.3 ″ E