Sample: AD-4

Sample ID:	AD-4 ^[1]
Station ID:	Adak_Island_Ash _Marker
AT Num:
Volcano:
Possible source:	Moffett
Eruption:	Moffett Intermediate Ash
Collector:	Unknown, Unknown
Date sampled:
Sample type 1:	Tephra Fall
Color:
Final unit:
Text Description:	Thickness of 4-8 cm. Consists of pumice gravel and lapilli with a maximum size of 3 cm. Small amounts of a gray clay- and silt-size material and fine-grained sand, and a large amount of rock fragments 0.5-0.8 cm in size. The coarser material is concentrated in the middle of the ash layer. Distinctive features include a considerably large amount of rock debris (13%), absence of pyroxene, and a very small content of green and brown hornblendes (1-2%).
Sample Location:

References Cited

[1] Volcanic ashes of Adak Island, Aleutian Islands, Alaska [Vulkanicheskiye peply na o-ve Adak (Aleutskiye o-va, SShA)], 1997

Kiriyanov, V. Y., and Miller, T. P., 1997, Volcanic ashes of Adak Island, Aleutian Islands, Alaska [Vulkanicheskiye peply na o-ve Adak (Aleutskiye o-va, SShA)]: Volcanology and Seismology [Vulkanologiya I Seysmologiya], v. 19, n. 1, p. 52-77.