Title
Rhyodacite
Identifier
HA-31
Description
Hand Sample: Aphanitic, pink-black rhyodacite. Sample contains alternating black and dark pink bands across face. Sample does not contain any vesicles or phenocrysts.
Thin Section: Groundmass is microcrystalline, with abundant phenocrysts of plagioclase, olivine, and pyroxenes.
Date
Sample collected in January, 1969.
Contributor
Western Minerals
Is Part Of
Volcanic Phenomena Suite - The Hawaiian Islands of Hawaii and Oahu
Spatial Coverage
Waiouai Range - Island of Oahu
Number of Thin Sections
1