Orbiculite
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.
Tags
Reuse
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0) (opens in a new window)Credit: Mario Wipki (distributed via imaggeo.egu.eu)
Properties
Type
Image
Format
JPG
Size
6.4 MB
Aspect
3:2
Width
3456 px
Height
2304 px
Brand
Canon
Model
D350
Exposure
50 mm f/6.3 1/100 s ISO 100
Coordinates
-28.0611, 117.8517
Tint
Medium gray
Submitted
10 January 2010
Comments
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