Mafic-plutonic sand, Antofagasta, Chile
Location:
North Chile, end of road along coast approx. 10 km south of Antofagasta.
Provenance:
Gabbroid rocks on western slope of the Cerro Coloso.
Composition:
White plagioclase, black hornblende, absence of quartz.
Texture:
Coarse sand, poorly sorted, almost not transported detritus.
Sample Number:
heubeck0128 - SA16
Collector:
Christoph Heubeck, FU Berlin
Date:
2005
Comments:
The Cerro Coloso is a "core complex" of mafic, plutonic rocks. They are found at > 1000 m on top of the cliff. The slope is described as an "angle of repose" and is covered by salt incrusted gravel and dune sands.
