The outer rim phenocrysts of augite and olivine, though the red stain, which concentrates in the glass and olivine phases, obscures the characteristic birefringence of the olivine. Plagioclase microlites are present in the glass and calcite has infilled some pore spaces. The core of this bomb appears to be hematite and glass cemented tiny quartz crystals.
The author has given permission for this work to be deposited in the Digital Archive of Colorado College.
The author has given permission for this work to be deposited in the Digital Archive of Colorado College.
