Ewingar Creek, Ewingar State Forest, Drake Co., New South Wales, Australia
|Latitude & Longitude (WGS84):||29° 7' 1'' South , 152° 26' 25'' East|
|Latitude & Longitude (decimal):||-29.11694,152.44028|
Located in Ewingar State Forest, east of Drake NSW, Ewingar Creek alluvials contain large euhedral smoky quartz crystals and occasionally amethyst, many of which are water-worn to some degree. Weathered pegmatite vughs in the surrounding granite have produced well-formed smoky quartz crystals to 40 cm and smaller single crystals with secondary amethyst overgrowths.
The Ewingar area was once worked for alluvial gold (approx. 1890's) and became a popular fossicking location for local gem clubs from the 1970's onwards.
Good quartz specimens can still be found, particularly after heavy rain and flooding, causing fresh gravel to be exposed in the creek.
3 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
|Early Triassic - Lopingian|
247.2 - 259.9 Ma
Age: Phanerozoic (247.2 - 259.9 Ma)
Description: Pale pinkish grey to grey, fine to medium-grained, coarsely porphyritic hornblende-titanite granodiorite to monzogranite; pale pink to white K-feldspar phenocrysts to 10 cm; locally abundant enclaves
Comments: igneous felsic intrusive; synthesis of multiple published descriptions
Lithology: Igneous felsic intrusive
Reference: Raymond, O.L., Liu, S., Gallagher, R., Zhang, W., Highet, L.M. Surface Geology of Australia 1:1 million scale dataset 2012 edition. Commonwealth of Australia (Geoscience Australia).