Browse Items (35 total)

  • Collection: (BB) Boulder Batholith Suite -- Montana

ignimbrite layer in a welded tuff

flinty, columnar jointing, post-batholith volcanic

from large sill

fine grained with pinkish tint

from nearly vertical dike cutting quartz monzonite

pre-batholith volcanic

intrusive plug of quartz monzonite

Output Formats

atom, dcmes-xml, json, omeka-xml, rss2