| 释义 |
- References
- Sources
- External links
Sentinel Gap is a water gap formed by the Columbia River in the Saddle Mountains, near Mattawa in Washington state.[1] The gap is "a water gap where erosion by the Columbia River was able to keep pace with folding, faulting and uplifting across the Saddle Mountain anticline".{{sfn|Bjornstad|2006|p=242}} During Ice Age floods in which waters from the Channeled Scablands found passage to the Pacific Ocean here and at Wallula Gap,{{sfn|Soehnichsen|2012|pp=154-155}} this opening was "repeatedly reamed out, which probably widened and steepened the walls of the gap".{{sfn|Bjornstad|2006|p=242}} Strandlines from the floods can be seen on the basalt walls of the gap.{{sfn|Bjornstad|2006|p=92}}[2]SR 243 runs along the east side of the river through the gap, and the river is spanned by the Beverly Railroad Bridge.[3] The gap is located between the Wanapum and Priest Rapids dams. Priest Rapids, for which the dam was named, are now submerged beneath the dam's reservoir about {{convert|4|miles}} downstream from Sentinel Gap. References1. ^{{GNIS|1508220|Sentinel Gap}}
2. ^{{citation|title=Sentinel Gap and Mattawa Bar|date=November 7, 2009|author=Tom Foster|website=Ice Age Floods: Glacial Lake Missoula, Lake Bonneville and the Ice Age Floods|url=http://iceagefloods.blogspot.com/2009/10/sentinel-gap-and-mattawa-bar.html}}
3. ^{{cite news |last=Lindsey |first=Kevin |date=July 25, 1983 |title=Columbia's early course visible at Sentinel Gap |page=D6 |work=Tri-City Herald}}
Sources- {{citation|title=On the Trail of the Ice Age Floods: A Geological Field Guide to the Mid-Columbia Basin|first=Bruce N. |last=Bjornstad|publisher=Keokee Books|year=2006|ISBN=9781879628274|OCLC=70697754}}
- {{citation|title=Washington's Channeled Scablands Guide|first=John|last=Soehnichsen|ISBN=978-1-59485-483-5|OCLC=910880058|year=2012|publisher=The Mountaineers Books}}
External links- {{Commons category inline|Sentinel Gap}}
{{Washington water gaps}}{{coord|46|48|19|N|119|56|02|W|type:landmark|display=title}}{{Washington-geo-stub}} 3 : Columbia River|Landforms of Kittitas County, Washington|Water gaps of the United States |