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SAMPLE INFO : AD-1
Sample ID:AD-1
Station ID:Adak_Island_Ash _Marker
Latitude:51.8
Longitude:-176.6
Datum:NAD83
Date Sampled:1993-00-00
Sample Type 1:Tephra Fall
Field Lithology:Andesite
Text Description:
Thickness of 6-10 cm. Consists of a pinkish-gray clay- or silt-size material containing lenses of fine-grained volcanic sand. Main components are volcanic glass (69%) and plagioclase (21%) with a characteristicly significant amount of pyroxenes (6%) and absence of green or brown hornblende. More than 50 wt. % of the sample are particles smaller than 0.071 mm in size. The glass is colorless, juvenile, and contains microlites of plagioclase.

References:
Volcanic ashes of Adak Island, Aleutian Islands, Alaska [Vulkanicheskiye peply na o-ve Adak (Aleutskiye o-va, SShA)]

SAMPLE LOCATION

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Page modified: August 1, 2017 15:29
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