Alaska Volcano Observatory - Isothermal plateau fission-track age of the late Pleistocene Old Crow Tephra, Alaska

ISOTHERMAL PLATEAU FISSION-TRACK AGE OF THE LATE PLEISTOCENE OLD CROW TEPHRA, ALASKA

Westgate, John, 1988, Isothermal plateau fission-track age of the late Pleistocene Old Crow Tephra, Alaska: Geophysical Research Letters, v. 15, n. 4, p. 376-379.

DATA TABLES *Not all tables in a publication may be listed. Not all tables from a publication have data entered in the database.

3561: Major-element compositions of glass shards in UT613 compared to type (UT1) and average composition of Old Crow tephra (OCt)

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* Notes: Major-element analyses (recast, H2O-free) were made on an ETEC Autoprobe fitted with an Ortec Si(Li) detector. Microprobe operated at 20 kV with a beam current set to give 3000 counts/s on willemite (- 90 nA); sample current - 150 pA; counting time 100s; beam diameter - l micron. Data reduction by a modified version of PESTRIPS. Mg and Mn concentrations below the detection limits. H2O, by difference and n is number of analyses. The mean and (1 sigma) given; sigma values for the average composition based on average glass composition at each sample locality [Westgate et al., 1985]. Analyses based on glass standards UA 5831, CAM 66, and KN 18. *

5421: Trace and rare-earth element composition of glass shards in UT613 and UT501 compared to type (UT1) and average composition of Old Crow tephra (OCT)

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SAMPLES

UT501
UT613
Old_Crow_tephra_average

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