Ahtanum Ridge

Ahtanum Ridge is a long anticline mountain ridge in Yakima County in the U.S. state of Washington. It is located just south of the city of Yakima, and much of its length is at the northern edge of the Yakama Indian Reservation.

Ahtanum Ridge is part of the Yakima Fold Belt of east-tending long ridges formed by the folding of Miocene Columbia River basalt flows.^[1]

Ahtanum Ridge separates Yakima Valley on the south from Ahtanum Valley on the north. At the eastern end of Ahtanum Ridge the Yakima River flows through Union Gap. The ridge continues east of Union Gap as the Rattlesnake Hills.

References

↑ Complete Report for Saddle Mountains structures, USGS Earthquake Hazards Program

External links

U.S. Geological Survey Geographic Names Information System: Ahtanum Ridge

Coordinates: 46°30′25″N 120°48′56″W / 46.50694°N 120.81556°W / 46.50694; -120.81556

Washington hills and ridges

Eastern Washington

Yakima Fold Belt	Ahtanum Ridge Badger Mountain Beezley Hills Candy Mountain Columbia Hills Frenchman Hills Horse Heaven Hills Manastash Ridge Rattlesnake Hills Rattlesnake Mountain Red Mountain Saddle Mountains Snipes Mountain Umtanum Ridge Wahluke Slope Yakima Ridge

Steptoes	Kamiak Butte Steptoe Butte

Other	Dishman Hills Palouse Hills

Western Washington

Pacific Coast Ranges incl. Olympic Mountains foothills	Black Hills Doty Hills Satsop Hills Willapa Hills

Other	Blue Hills Issaquah Alps Kitsap County

Olympic-Wallowa Lineament

List of mountain ranges in Washington

This article is issued from Wikipedia - version of the 9/5/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.