Cinder
From Biocrawler, the free encyclopedia.
Cinders are fragments of cooled pyroclastic material lava, typically red or black in color.
The following geologic characteristics define a cinder:
- Uncemented.
- Vitric.
- Bubble-like cavities, called vesicles.
- Fragments are more than 2.0 mm in at least one dimension.
- Apparent specific gravity between 1.0 and 2.0 mm.
