Sample: Jensen_2008_Chester_Bluff_Variegated_tephra-P2
| Sample ID: |
Jensen_2008_Chester_Bluff_Variegated_tephra-P2 [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: |
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| Final unit: |
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| Text Description: |
Only present at Site B of Chester Bluff. VT tephra is the upper-most tephra at Site B and is deposited in loose, reworked loess with modern root penetration. VT is wispy, gray, up to 0.5 cm thick, with slightly diffuse contacts, and continuous across 2m. Richer in frothy pumice and have fewer bubble-walled and tri-cuspate shards. Rare phenocrysts (<20%) are dominated by ortho- and clino-pyroxenes, and very rarely contain green amphibole. The composition reported was calculated from analyses of one sample: UA1097. |
| 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.