King, Georgina E., Pearce, Nicholas J. G., Roberts, Helen M., Smith, Victoria C., Westgate, John A., Gaylord, David R. and Sweeney, Mark R. (2016). Identification of a Kulshan caldera correlative tephra in the Palouse loess of Washington State, northwest USA. Quat. Res., 86 (2). S. 232 - 242. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1096-0287
Full text not available from this repository.Abstract
The Kulshan caldera formed at -1.15 Ma on the present-day site of Mt. Baker, Washington State, northwest USA and erupted a compositionally zoned (dacite-rhyolite) magma and a correlative eruptive, the Lake Tapps tephra. This tephra has previously been described, but only from the Puget Lowland of NW Washington. Here an occurrence of a Kulshan caldera correlative tephra is described from the Quaternary Palouse loess at the Washtucna site (WA-3). Site WA-3 is located in east-central Washington, similar to 340 km southeast of the Kulshan caldera and similar to 300 km east-southeast of the Lake Tapps occurrence in the Puget Lowland. Major- and trace element chemistry and location of the deposit at Washtucna within reversed polarity sediments indicates that it is not correlative with the Mesa Falls, Rockland, Bishop Ash, Lava Creek B or Huckleberry Ridge tephras. Instead the Washtucna deposit is related to the Lake Tapps tephra by fractional crystallisation, but is chemically distinct, a consequence of its eruption from a compositionally zoned magma chamber. The correlation of the Washtucna occurrence to the Kulshan caldera-forming eruption indicates that it had an eruptive volume exceeding 100 km(3), and that its tephra could provide a valuable early-Pleistocene chronostratigraphic marker in the Pacific Northwest. (C) 2016 University of Washington. Published by Elsevier Inc. All rights reserved.
Item Type: | Journal Article | ||||||||||||||||||||||||||||||||
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URN: | urn:nbn:de:hbz:38-266002 | ||||||||||||||||||||||||||||||||
DOI: | 10.1016/j.yqres.2016.06.004 | ||||||||||||||||||||||||||||||||
Journal or Publication Title: | Quat. Res. | ||||||||||||||||||||||||||||||||
Volume: | 86 | ||||||||||||||||||||||||||||||||
Number: | 2 | ||||||||||||||||||||||||||||||||
Page Range: | S. 232 - 242 | ||||||||||||||||||||||||||||||||
Date: | 2016 | ||||||||||||||||||||||||||||||||
Publisher: | ACADEMIC PRESS INC ELSEVIER SCIENCE | ||||||||||||||||||||||||||||||||
Place of Publication: | SAN DIEGO | ||||||||||||||||||||||||||||||||
ISSN: | 1096-0287 | ||||||||||||||||||||||||||||||||
Language: | English | ||||||||||||||||||||||||||||||||
Faculty: | Unspecified | ||||||||||||||||||||||||||||||||
Divisions: | Unspecified | ||||||||||||||||||||||||||||||||
Subjects: | no entry | ||||||||||||||||||||||||||||||||
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Refereed: | Yes | ||||||||||||||||||||||||||||||||
URI: | http://kups.ub.uni-koeln.de/id/eprint/26600 |
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