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The Great Red Wall fault-bounded sediment mass

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The Great Red Wall fault-bounded sediment mass


View, looking northeast and dating from the late 1990's, of a fault bounded block of Passaic(?) formation mudstone within the lower portion of the Orange Mountain basalt. Calcite filled fractures along the basalt/sediment contact and gash veins perpendicular to the contact commonly contained chalcocite and native copper with minor native silver. The southwest side, visible here, was more intensely mineralized than the opposite side.

For a number of years this block of sediment was progressively exposed and stood as a monolith on the quarry floor. It was often refered to as "The Great Red Wall". In the early 2000's quarrying completely encircled it. The monolith was nearly flattened and used for ramp fill

This photo has been shown 4880 times
Photo added:28th Feb 2008
Dimensions:1600x1200px (1.92 megapixels)
Date/Time of Photo:28th Feb 2008 12:44:06
Camera:MINOLTA DiMAGE 7i
Software:Ver.1.11u
Exposure time:1/1000s
Aperture:f/5.6
Focal Length:49mm
Focal Length (35mm film equivalent):195mm
ISO speed:100
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