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MOSS AGATE
Moss agate. Agate is an aggregate of different forms of silica (SiO2) that have formed concentric bands within a geode. A geode forms when the silica precipitates from liquid onto the inside surface of an empty pocket in a host rock. The outer layers are variegated forms of chalcedony (amorphous or non-crystalline silica), with the layers becoming more crystalline towards the centre. (KEYSTONE/SCIENCE PHOTO LIBRARY/NATURAL HISTORY MUSEUM, LONDON)
Instruktionen
COPYRIGHTPFLICHTIG
Lizenz
Rights Managed
Erstellungsdatum
20110201
Ort
Credit
KEYSTONE
Source
SCIENCE PHOTO LIBRARY SPL
Byline
NATURAL HISTORY MUSEUM, LONDON
Grösse
3526 x 2478 px
Dateityp
JPEG