ignimbrite
/ˈɪɡnɪmbrʌɪt
/noun [mass noun] Geology
A volcanic rock consisting essentially of pumice fragments, formed by the consolidation of material deposited by pyroclastic flows.Significant differential neotectonic rotations are not evident across the NE continuation of this fault but are detected across the Erciyes pull-apart basin in the 2.8 Ma Incesu ignimbrite....
- Low glass viscosity and rapid welding of ignimbrite would be principally favoured by high-temperature emplacement, alkaline magmatic composition and incomplete degassing.
- The unit is an orange/red-weathered ignimbrite, which is generally massive and strongly feldsparphyric.
Origin
1930s: from Latin ignis 'fire' + imber, imbr- 'shower of rain, storm cloud' + -ite1.