Magnetostratigraphy and Tectonic Rotation of the Eocene-Oligocene Makah and Hoko River Formations, Northwest Washington, USA
Joint Authors
Prothero, Donald R.
Burns, Casey
Draus, Elizabeth
Source
International Journal of Geophysics
Issue
Vol. 2009, Issue 2009 (31 Dec. 2009), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2009-06-04
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Abstract EN
The Eocene-Oligocene Makah Formation and subjacent middle Eocene Hoko River Formation of the northwestern Olympic Peninsula, Washington, yield mollusks, crustaceans, foraminifera, and early neocete whales; their age has never been precisely established.
We sampled several sections; most samples showed a stable single-component remanence held largely in magnetite and passed a Class I reversal test.
The upper Refugian (late Eocene) and lower Zemorrian (early Oligocene) rocks at Baada Point correlate with Chron C13r (33.7–34.7 Ma) and Chron C12r (30–33 Ma).
The Ozette Highway section of the Makah Formation spanned the early Refugian to late Refugian, with a sequence that correlates with Chrons C15r-C13r (33.7–35.3 Ma), and a long reversed early Zemorrian section that correlates with Chron C12r (30–33 Ma).
The type section of the Hoko River Formation correlates with Chron C18r (40.0–41.2 Ma).
The area sampled shows about 45∘ of post-Oligocene counterclockwise tectonic rotation, consistent with results obtained from the Eocene-Oligocene rocks in the region.
American Psychological Association (APA)
Prothero, Donald R.& Draus, Elizabeth& Burns, Casey. 2009. Magnetostratigraphy and Tectonic Rotation of the Eocene-Oligocene Makah and Hoko River Formations, Northwest Washington, USA. International Journal of Geophysics،Vol. 2009, no. 2009, pp.1-15.
https://search.emarefa.net/detail/BIM-509085
Modern Language Association (MLA)
Prothero, Donald R.…[et al.]. Magnetostratigraphy and Tectonic Rotation of the Eocene-Oligocene Makah and Hoko River Formations, Northwest Washington, USA. International Journal of Geophysics No. 2009 (2009), pp.1-15.
https://search.emarefa.net/detail/BIM-509085
American Medical Association (AMA)
Prothero, Donald R.& Draus, Elizabeth& Burns, Casey. Magnetostratigraphy and Tectonic Rotation of the Eocene-Oligocene Makah and Hoko River Formations, Northwest Washington, USA. International Journal of Geophysics. 2009. Vol. 2009, no. 2009, pp.1-15.
https://search.emarefa.net/detail/BIM-509085
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-509085