Sample: 09KCnye011a
| Sample ID: | 09KCnye011a [1] |
| Station ID: | 09KCNYE011 |
| AT Num: | |
| Volcano: | Kasatochi |
| Possible source: | Kasatochi |
| Eruption: | |
| Collector: | Nye, C. J. |
| Date sampled: | 2009-01-01 |
| Sample type 1: | pyroclastic density current |
| Color: | |
| Final unit: | |
| Text Description: | Luna pyroclastic deposits. White pumice, salmon weathering, in young pre-08 pfs in little fingers and arroyos just N of old cabin site. Can see '08 deposits on top. NO SOIL, must have been peeled off and stripped during eruption, unlike S coast, where turf mat is preserved beneath thin deposits. This unit is predominantly pfs with lithic blocks up to 30 cm, typically 3-5 cm. Sample is from isolated pumice layer (discontinuous over 10's of meters horizontally) ~5-6 cm thick, pmax ~5cm. The bag contains two major lithologies. 09KCnye011a, approx 70% by volume, is 20%k pumice, mostly subrounded (but pMax - 9x7x5cm is subangular) w/ ~20% phenocrysts [1mm plag, 1x2mm cpx>opx>amph]. Vesicles are irregular, gms may be microlitic. Sample of 11a from a few 2-3cm pumices. 09KCnye011b, ~30 vol% is very pale tannish-gray (10% black) and is mostly distinguished by having bulk density <1g/cm3 (it floats). Phenocrysts of plag, px, am somewhat smaller and less abundant than 011a. Vesicles less are round, abundant, and generally 0.5 mm or less. Sample of 011a from several separate pumices. |
| Sample Location: |