Orbiculite
by Mario Wipki, GFZ Potsdam, Potsdam, Germany
Orbiculite from W-Australia - can be visited opposite of the holocaust memorial in Tiergarten. Maybe the oldest exposed rock in Berlin - older than 2 billion years. See also www.globalstone.de/ comes from near Mount Magnet in Western Australia. The orbicules occur in a granodiorite matrix. They consist of andesine, plagioclase, hornblende biotite arranged radially around a core of plagioclase or hornblende or less commonly mafic schist.
Categories
- Earth Magnetism & Rock Physics (345)
- Field (2770)
- Geochemistry, Mineralogy, Petrology & Volcanology (864)
Location
- Oceania (221)
- Australia and New Zealand (2)
- Exact location (117.8517 E, -28.0611 S)
Tags
Colours
Image properties
3456 × 2304 px;
image/jpeg; 6.4 MB
Camera:
Canon D350
Submitted on Jan. 10, 2010
Licence
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)
Credit
Mario Wipki (distributed via imaggeo.egu.eu)
Share
Appreciate
Report
Klaus Gessner 6 years, 8 months ago
Please follow this link for information on where this rock naturally occurs, including geological background; http://www.nationalrockgarden.org.au/rock-collection-2/rock-listing/show/11