Browse Items (32 total)

  • Collection: (HA) Volcanic Phenomena Suite -- The Hawaiian Islands of Hawaii and Oahu

Hand Sample
Hand Sample: Microcrystalline vesicular, dark-gray to black scoria. Vesicle size varies throughout the sample, ranging from larger circular vesicles with a diameter of approx. 1.5 cm on one surface and small vesicles (less than 0.1cm in diameter) on…

Hand Sample
Hand Sample: Aphanitic vesicular dark gray-black basalt. Sample contains numerous vesicles ranging in size from 0.01cm to 1.5 cm.

Hand Sample
Hand Sample: Apahanitic vesicular dark gray-black basalt. Larger (

Hand Sample
Hand Sample: Aphanitic vesicular dark gray-black basalt with larger light crystals throughout the sample. The vesicles throughout the sample are elongate in shape, and range in size from 0.5 cm to 2.5 cm. Sample surface displays rough AA texture.

Hand Sample
Hand Sample: Aphanitic dark gray vesicular basalt. Basalt has ropey pahoehoe texture on top surface and contains numerous elongated vesicles.

Hand Sample
Hand Sample: Aphanitic medium gray vesicular basalt with scattered olivine crystals. Olivine crystals are commonly growing either in clusters or as one single crystal. Vesicles are found throughout sample and range in diameter from 0.05cm to 2cm.

Hand Sample
Hand Sample: Aphanitic dark gray vesicular basalt. The vesicles are uniform and common throughout the sample, with diameters of approx. 0.05 cm.

Hand Sample
Hand Sample: Aphanitic medium gray vesicular basalt with scattered olivine crystals. Olivine crystals are scattered throughout the sample and are either growing in clusters or as single crystals. Olivine crystals range in size from 0.05cm to 0.5cm in…

Hand Sample
Trachytes are an igneous volcanic rock with an aphanitic or porphyritic texture. Alkali feldspar, low amounts of plagioclase and quartz or a feldspathoid are common in trachytes.

Hand Sample
Hand Sample: Aphanitic dark gray trachyte. Sample contains zones with abundant tiny vesicles (less than 0.1cm in diameter), however the majority of the sample does not contain any vesicles or phenocrysts.

Hand Sample
Hand Sample: Imperfect volcanic bomb. Aphanitic with reddish brown color. Observed mudcrack texture of surface likely formed due to weathering. Sample contains abundant vesicles (< 0.05cm in size).

HA Suite.pdf
OCR RPD of supplemental information for the Volcanic Phenomena Suite - The Hawaiian Islands of Hawaii and Oahu
Output Formats

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