Glengarry Opal Field, Lightning Ridge, Finch Co., New South Wales, Australiai
Regional Level Types | |
---|---|
Glengarry Opal Field | Mining Field |
Lightning Ridge | Town |
Finch Co. | County |
New South Wales | State |
Australia | Country |
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Latitude & Longitude (WGS84):
29° 40' 7'' South , 147° 37' 19'' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Mindat Locality ID:
146636
Long-form identifier:
mindat:1:2:146636:5
GUID (UUID V4):
e0ffbe4d-eb84-49d2-97c8-9cbbf2419799
Glengarry opal field is located 8 kilometres southwest of the Grawin Opal field and some 70 kilometres southwest of the Lightning Ridge Opal field.
Numerous deposits in the area.
About 40 kilometres southwest of Lightning Ridge.
Underground and open cut mining techniques are used to extract opal from depths ranging from near surface up to 25 metres underground. The host rock is the Cretaceous Griman Creek Formation, which is predominantly composed of freshwater (rarely estuarine?) claystones and sandstones.
Most of the gem opal from this area is found as "seam" opal. Seam opal typically occurs as semi-continuous plates or sheets of variable thickness within claystone layers. The thickness of the sheet can range from less than 1 mm up to 5 cm or more. Individual pieces can rarely weigh up to a few kilograms.
Opalised fossils also occur sporadically. Fossils include bivalve shells, gastropod shells, dinosaur bones & teeth, turtle shell & bones, crustacean gastroliths, plant stems & fruiting bodies, plesiosaur bones & teeth, monotreme bones, etc.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
1 valid mineral.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
ⓘ Opal Formula: SiO2 · nH2O |
ⓘ Opal var. Black Opal Formula: SiO2 · nH2O |
ⓘ Opal var. Bone Opal Formula: SiO2 · nH2O |
ⓘ Opal var. Precious Opal Formula: SiO2 · nH2O |
ⓘ Opal var. Shell Opal |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 4 - Oxides and Hydroxides | |||
---|---|---|---|
ⓘ | Opal | 4.DA.10 | SiO2 · nH2O |
ⓘ | var. Precious Opal | 4.DA.10 | SiO2 · nH2O |
ⓘ | var. Black Opal | 4.DA.10 | SiO2 · nH2O |
ⓘ | var. Bone Opal | 4.DA.10 | SiO2 · nH2O |
ⓘ | var. Shell Opal | 4.DA.10 | SiO2 · nH2O |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Opal | SiO2 · nH2O |
H | ⓘ Opal var. Precious Opal | SiO2 · nH2O |
H | ⓘ Opal var. Black Opal | SiO2 · nH2O |
H | ⓘ Opal var. Bone Opal | SiO2 · nH2O |
O | Oxygen | |
O | ⓘ Opal | SiO2 · nH2O |
O | ⓘ Opal var. Precious Opal | SiO2 · nH2O |
O | ⓘ Opal var. Black Opal | SiO2 · nH2O |
O | ⓘ Opal var. Bone Opal | SiO2 · nH2O |
Si | Silicon | |
Si | ⓘ Opal | SiO2 · nH2O |
Si | ⓘ Opal var. Precious Opal | SiO2 · nH2O |
Si | ⓘ Opal var. Black Opal | SiO2 · nH2O |
Si | ⓘ Opal var. Bone Opal | SiO2 · nH2O |
Other Regions, Features and Areas containing this locality
Australia
- Eromanga BasinBasin
- Lachlan OrogenOrogen
- Eastern ProvinceGeologic Province
Australian PlateTectonic Plate
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