The Blowhole, Tocumwal, Denison Co., New South Wales, Australia
|Latitude & Longitude (WGS84):||35° 45' 31'' South , 145° 37' 19'' East|
|Latitude & Longitude (decimal):||-35.75888,145.62205|
|Age:||485.4 ± 1.9 Ma to present day|
|Geologic Time:||Furongian : Ordovician to Quaternary|
|Reference for age:||Hall, L.R., Whiting, J.W. (1957) Jerilderie - 4 mile Geological Series, Sheet I/55-14, Australian National Grid, Explanatory Notes No.7. Bureau of Mineral Resources, Geology and Geophysics, Department of National Development, Commonwealth of Australia.|
|Köppen climate type:||Cfa : Humid subtropical climate|
An outcrop of granite with a deep, apparently spring fed at times, gnamma (water hole or solution pit). Several small dimension stone quarries are located nearby. The granite is poorly described in the literature.
7 valid minerals.
Rock Types Recorded
Select Rock List TypeAlphabetical List Tree Diagram
Entries shown in red are rocks recorded for this region.
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
419.2 - 443.8 Ma
Age: Silurian (419.2 - 443.8 Ma)
Stratigraphic Name: Tocumwal Granite
Description: White often porphyritic biotite granite
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).