...
| | |
|
| Foamy obsidian, glass bead is 200μ |
Location:
Conaripe, Lago Calafquen, South Chile; low energetic beach of a former glacier lake
...
Green and black obsidian, with embedded clinopyroxene and plagioclase; andesitic mikrolithes, ignimbrit; PRF's: plagioclase, ortho-/clinoyroxene clinopyroxene (Gabbro); monocrystalline quartz; SRF: Aragonit (Ooid)
|
Petrographic thin section:
...
