Olympic-Wallowa Lineament - Summary: What We Know About The OWL

Summary: What We Know About The OWL

• First reported by Erwin Raisz in 1945.
• Seems to have more depressions and basins on the north side.
• Associated with many right-lateral strike-slip fault zones.
• Seems to be expressed in Quaternary (recent) glacial deposits.
• Does not offset Columbia River Basalts, so older than 17 million years.
• Not offset by the Straight Creek Fault, so probably younger than 41 million years. (Maybe.)
• Approximately separates oceanic-continental provinces.
• Not an oceanic-continental crustal boundary. (Maybe.)
• Not a hotspot track. (Maybe.)
• Seems to be aligned with lithospheric flow from the Juan de Fuca Ridge.
• Seems to be faint and confused in Oregon.