Sample: Jensen_2008_Chester_Bluff_Andrew_Creek_tephra
| Sample ID: |
Jensen_2008_Chester_Bluff_Andrew_Creek_tephra [1] [2] |
| Station ID: |
Jensen_2008_Chester_Bluff |
| AT Num: |
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| Volcano: |
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| Possible source: |
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| Eruption: |
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| Collector: |
Jensen, B. J. L. |
| Date sampled: |
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| Sample type 1: |
Tephra Fall |
| Color: |
white |
| Final unit: |
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| Text Description: |
Only present at Site A of Chester Bluff. Andrew Creek (AC) tephra is white, up to 0.5 cm thick and continuous over 75 cm at Site A. It is directly above a highly deformed organic-rich horizon and is partially reworked into thinly laminated silt with detrital plant material and rare ripples <1 cm thick. A high percentage of feldspar in AC displays albite twinning. Contaminated by detrital material but also appear to be dominated by green amphibole and some ortho-pyroxene. The composition reported was calculated from analyses of three samples: UA1062, UT1877, and UT1665. |
| Sample Location: |
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References Cited
Jensen, B.J.L., Froese, D.L., Preece, S.J., Westgate, J.A., and Stachel, Thomas, 2008, An extensive middle to late Pleistocene tephrochronologic record from east-central Alaska: Quaternary Science Reviews, v. 27, p. 411-427, doi:10.1016/j.quascirev.2007.10.010 .
Jensen, B.J.L., 2007, Tephrochronology of Middle to Late Pleistocene Loess in Eastcentral Alaska: University of Alberta M.S. thesis, 120 p.