AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
Introduction | Reference Search | Glossary 
You are here: Home > Library > The Dawson Cut Forest Bed in the Fairbanks area, Alaska, is about two million years old

THE DAWSON CUT FOREST BED IN THE FAIRBANKS AREA, ALASKA, IS ABOUT TWO MILLION YEARS OLD
citation imageWestgate, J. A., Preece, S. J., and Pewe, T. L., 2003, The Dawson Cut Forest Bed in the Fairbanks area, Alaska, is about two million years old: in Westgate, J. A., (ed.), Special issue dedicated to Troy Pewe, Quaternary Research, v. 60, n. 1, p. 2-8.

DATA TABLES *Not all tables in a publication may be listed. Not all tables from a publication have data entered in the database.
4261: Composition of glass shards in tephra beds in the Dawson Cut Forest Bed and Gold Hill Loess, Fairbanks, Alaska
View table data :: Download table data (.csv)
* Notes. Glass analyses (wt. %) for UA351, UT497, UT1280, UT1281 were done in a single run using a Cameca SX-50 wave-length dispersive electron microprobe. Operating conditions were 15 keV accelerating voltage, 10–15 micron beam diameter, and 6 nA beam current. Other glass analyses * (UT497, UA355, UA352, UA353, UA360) determined on an ETEC Autoprobe fitted with an Ortec Si(Li) detector. Microprobe operated at 20 keV with a beam current set to give 3000 counts per second on willemite; sample current about 0.23 nA, counting time 100 s. Data reduction by modified version of PESTRIPS. MgO and MnO values assumed from Cameca analyses; unnormalized values added to unnormalized ETEC data and then analyses normalized. All analyses recast to 100% on a water-free basis; mean and one standard deviation (in brackets) given. FeOt = total iron oxide as FeO; H2Od = water, by difference; n = number of analyses. Accuracy of analyses monitored against glass standard UA5831. Individual analyses are given in Table S1, which is available as supplementary data on IDEAL website. *

SAMPLES
Contact AVO Privacy Accessibility Information Quality FOIA
URL: avo.alaska.edu/downloads/reference.php
Page modified: February 16, 2017 16:07
Contact Information: AVO Web Team

twitter @alaska_avo
facebook alaska.avo
email Receive volcano updates by email: USGS VNS

This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G19AC00060 and G19AC00171.

Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.