Sample: UT19

Sample ID:	UT19 ^[1] ^[2] ^[3] ^[4] ^[5] ^[6]
Station ID:	UT19
AT Num:
Volcano:
Possible source:
Eruption:
Collector:	Milner, M. W.
Date sampled:	1975-01-01
Sample type 1:	Tephra Fall
Color:	grey
Final unit:
Text Description:	2-cm-thick discontinuous bed with alluvium on an intermediate terrace of Bonanza Creek; consists mostly of bubble-wall glass shards with feldspar, orthopyroxene, clinopyroxene and minor amounts of green or red amphibole, titanomagnetite, ilmenite, apatite and zircon(from Sandhu et al. 2001). In 1 m thick silty clay overbank sediments overlying 1 m thick gravel resting on a well developed strath terrace (Archibald's Bench). Field name MWM9
Sample Location:

References Cited

[1] Characterization, identity, distribution, and source of late Cenozoic tephra beds in the Klondike District of the Yukon, Canada, 2000

Preece, S. J., Westgate, J. A., Alloway, B. V., and Milner, M. W., 2000, Characterization, identity, distribution, and source of late Cenozoic tephra beds in the Klondike District of the Yukon, Canada: Canadian Journal of Earth Sciences, v. 37, n. 7, p. 983-996.

[2] Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska, 1982

Naeser, N. D., Westgate, J. A., Hughes, O. L., and Pewe, T. L., 1982, Fission-track ages of late Cenozoic distal tephra beds in the Yukon Territory and Alaska: Canadian Journal of Earth Sciences [Journal Canadien des Sciences de la Terre], v. 19, n. 11, p. 2167-2178.

[3] A contribution to the Pleistocene geochronology of Alaska and the Yukon Territory: fission-track age of distal tephra units, 1978

Briggs, N. D., and Westgate, J. A., 1978, A contribution to the Pleistocene geochronology of Alaska and the Yukon Territory: fission-track age of distal tephra units: in Short papers of the fourth international conference, geochronology, cosmochronology, isotope geology, 1978, U.S. Geological Survey Open-File Report 78-0701, p. 49-52.

[4] A catalogue of late Cenozoic tephra beds in the Klondike Goldfields and adjacent areas, Yukon Territory, 2011

Preece, S.J., Westgate, J.A., Froese, D.G., Pearce, N.J.G., and Perkins, W.T., 2011, A catalogue of late Cenozoic tephra beds in the Klondike Goldfields and adjacent areas, Yukon Territory: Canadian Journal of Earth Sciences, v. 48, p. 1386-1418, doi: 10.1139/e10-110

[5] Dating Early and Middle (Reid) Pleistocene glaciations in central Yukon by tephrochronology, 2001

Westgate, J.A., Preece, S.J., Froese, D.G., Walter, R.C., Sandhu, A.S., and Schweger, C.E., 2001, Dating Early and Middle (Reid) Pleistocene glaciations in central Yukon by tephrochronology: Quaternary Research, v. 56, n. 3, p. 335-348, doi: 10.1006/qres.2001. 2274 .

[6] Glass-fission-track ages of late Cenozoic distal tephra beds in the Klondike district, Yukon Territory, 2000

Sandhu, A.S., Westgate, J.A., Preece, S.J., and Froese, D.G., 2000, Glass-fission-track ages of late Cenozoic distal tephra beds in the Klondike district, Yukon Territory, in Emond, D.S., and Weston, L.H., (eds.), Yukon exploration and geology 2000: Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, p. 247-256.

Alaska Volcano Observatory