ash tuff meaning in Hindi

Examples

1. Fine volcanic ash is also erupted and forms ash tuff deposits, which can often cover vast areas.
2. The maximum advance without initial ground support may reach 20 ft ( 6 m ) or more in stable volcanic ash tuff.
3. They consist of partly altered volcanic rock from vents in both volcanic provinces, including varied lavas and ash tuffs ranging in age from 0 to 40 million years.
4. The host rocks of the Bisha deposit are, for the most part, felsic and intermediate lapilli, ash, and crystal ( fine-to medium-grained feldspar, quartz, biotite locally hornblende ) ash tuffs that are variably altered.