(Table 2) Average major-element composition of glass shards from Toba Tephra Beds in Sumatra, Malaysia, India, and the Indian Ocean

DOI

Positions are estimated from map. Analyses done on a Cameca SX-50 wavelength dispersive electron microprobe operating at 15 kV accelerating voltage, 20-mm beam diameter, 6nA beam current, and counting times of 20-55 s with Na and Al being analyzed first, as recommended by Morgan and London (1996). Standardization achieved by use of mineral and glass standards. Analyses recast to 100% on a water-free basis. All samples are rhyolites (IUGS classification, Le Bas et al., 1986).

Identifier
DOI https://doi.org/10.1594/PANGAEA.754823
Related Identifier https://doi.org/10.1594/PANGAEA.754857
Related Identifier https://doi.org/10.1006/qres.1998.1974
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.754823
Provenance
Creator Westgate, John A; Shane, Philip A R ORCID logo; Pearce, Nicholas J G ORCID logo; Perkins, William T; Korisettar, Ravi; Chesner, Craig A; Williams, Martin A J; Acharyya, Subhrangsu K
Publisher PANGAEA
Publication Year 1998
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Resource Type Dataset
Format text/tab-separated-values
Size 455 data points
Discipline Earth System Research
Spatial Coverage (73.500W, 2.685S, 101.717E, 29.400N); Indian Ocean