http://resource.geosciml.org/classifier/cgi/lithology/ash_breccia_bomb_or_block_tephra
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| definition | Tephra in which more than 25 percent of particles are greater than 64 mm in largest dimension. Includes ash breccia, bomb tephra and block tephra of Gillespie and Styles (1999) | ||||||
| source | Schmid 1981; LeMaitre et al. 2002 | ||||||
| type |
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| in scheme | simplelithology original | ||||||