Sample: Y-74
| Sample ID: | Y-74 [1] |
| Station ID: | Y-74 |
| AT Num: | |
| Volcano: | Kaguyak |
| Possible source: | |
| Eruption: | Kaguyak CFE |
| Collector: | Fierstein, J. E. |
| Date sampled: | 2000-00-00 |
| Sample type 1: | pyroclastic density current |
| Color: | |
| Final unit: | |
| Text Description: | Kaguyak Ignimbrite. Rich in pale-grey pumice clasts and dacitic lava lithics in massive matrix, which is dark grey-brown when wet, dries pale grey. Includes as much as 30% clasts. Largely massive with no stratifications. Lower part is well indurated, almost sintered dark brown-grey zone of ignimbrite. Exposed thickness 15-18 m. Marked PCZ (30 cm to 1 m thick) near top of ignimbrite. See text for MP and ML. Pumice clasts: grey to white crystal-rich dacite pumices most common. Uncommon black scoria is present. All are coarsely vesicular and dense. Lithic clasts: mostly dark to medium-grey, large-pl-rich dacite lava. Some scattered orange altered lava clasts and widely scattered Jn clasts. 10-15 volume% lithics may account for matrix color. |
| Sample Location: |
References Cited
[1] Kaguyak dome field and its Holocene caldera, Alaska Peninsula, 2008
Fierstein, Judy, and Hildreth, Wes, 2008, Kaguyak dome field and its Holocene caldera, Alaska Peninsula: Journal of Volcanology and Geothermal Research, v. 177, n. 2, p. 340-366, doi:10.1016/j.jvolgeores.2008.05.016 .
full-text PDF 3.16 MB