Rhyodacite

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

Geolocation