Sample: Ahklun Mountains-Tephra-A(Aniakchak)-Pop.1_average

Sample ID:	Ahklun Mountains-Tephra-A(Aniakchak)-Pop.1_average ^[1] ^[2] ^[3] ^[4]
Station ID:	Ahklun Mountains Regional Tephra
AT Num:
Volcano:
Possible source:	Aniakchak
Eruption:	Aniakchak CFE II
Collector:	Kaufman, D. S.
Date sampled:
Sample type 1:	Tephra Fall
Color:
Final unit:
Text Description:	Average composition of samples from Lone Spruce Pond (UA1963), Sunday Pond (UA1780), Little Swift Lake (Axford and Kaufman 2004) (UA1967), Waskey Lake (Levy et al. 2004) (UA1968), Arolik Lake (Kaufman et al. 2003) (UA1970), and subsamples from three levels in the soil pit near Cascade Lake (Kathan 2006) (UA1975, UA1976, UA1977). This tephra comprises the thickest bed in all lakes from the region (likely including Nimgun Lake, which was not analyzed and somewhat older than expected), and is essentially ubiquitous in outcrops and soil pits across the landscape. Tephra A contains a high percentage of bubble-wall and tricuspate shards, platy glass, elongate pumice, and pumice with large vesicles. Less common are blocky glass and pumice, which are occasionally crystal-rich. Brown and clear glass shards are present in roughly the same proportion.
Sample Location:

References Cited

[1] Late glacial and Holocene glacier and vegetation fluctuations at Little Swift Lake, Southwestern Alaska, U.S.A., 2004

Axford, Yarrow, and Kaufman, D.S., 2004, Late glacial and Holocene glacier and vegetation fluctuations at Little Swift Lake, Southwestern Alaska, U.S.A.: Arctic, Antarctic, and Alpine Research, v. 36, n. 2, p. 139-146.

[2] Late Quaternary tephrostratigraphy, Ahklun Mountains, SW Alaska, 2012

Kaufman, D.S., Jensen, B.J.L., Reyes, A.V., Schiff, C.J., Froese, D.G., and Pearce, N.J.G., 2012, Late Quaternary tephrostratigraphy, Ahklun Mountains, SW Alaska: Journal of Quaternary Science, v. 27, n. 4, p. 344-359, doi:10.1002/jqs.1552 .

[3] A 33,000 year record of environmental change from Arolik Lake, Ahklun Mountains, Alaska, 2003

Kaufman, D.S., Hu, F.S., Briner, J.P., Werner, Al, Finney, B.P., and Gregory-Eaves, Irene, 2003, A 33,000 year record of environmental change from Arolik Lake, Ahklun Mountains, Alaska: Journal of Paleolimnology, v. 30, p. 343-362.

[4] Late Holocene climate fluctuations at Cascade Lake, northeastern Ahklun Mountains, southwestern Alaska, 2006

Kathan, Kasey, 2006, Late Holocene climate fluctuations at Cascade Lake, northeastern Ahklun Mountains, southwestern Alaska: Northern Arizona University M.S. thesis, 112 p., available at http://jan.ucc.nau.edu/~dsk5/S_AK/Cascade/KK_ThesisFinal.pdf .