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The Lower Snake and Clearwater Canyons ecoregion consists of deep canyons cut through the basalts of the Columbia Plateau by the Snake and Clearwater Rivers. Canyon depths exceed 1,400 feet (430 m) and create drier conditions than in neighboring regions; mean annual precipitation is only 12 to 25 inches (300 to 640 mm).
The Ouachita Mountains near Caney Creek, Arkansas Mount Magazine, the highest point in Arkansas Buffalo national river steel creek overlook. 36a Athens Plateau; 36b Central Mountain Ranges; 36c Central Hills, Ridges, and Valleys; 36d Fourche Mountains; 36e Western Ouachitas
The Columbia Plateau is an important geologic and geographic region that lies across parts of the U.S. states of Washington, Oregon, and Idaho. [1] It is a wide flood basalt plateau between the Cascade Range and the Rocky Mountains , cut through by the Columbia River .
It also connects east onto the Snake River Plain, which it follows east from Hells Canyon to the continental divide in eastern Idaho. [2] Information about this ecoregion is covered by three articles that follow the ecoregion definitions of the United States Environmental Protection Agency: Columbia Plateau; Snake River Plain; Northern Basin ...
In the United States, the EPA and the United States Geological Survey (USGS) are the principal federal agencies working with the CEC to define and map ecoregions. Ecoregions may be identified by similarities in geology , physiography , vegetation , climate , soils , land use , wildlife distributions, and hydrology .
Ecoregions of North America, featuring the 50 United States, the District of Columbia and the five inhabited territories. The following is a list of United States ecoregions as identified by the World Wide Fund for Nature (WWF). The United States is a megadiverse country with a high level of endemism across a wide variety of ecosystems.
The 2024 northern pikeminnow bounty season on the Columbia and Snake rivers opens May 1, with decent money to be made. “Catch cash, save salmon,” says the Northern Pikeminnow Sport Reward Program.
The half of the state south of Little Rock is apter to see ice storms. Arkansas's record high is 120 °F (49 °C) at Ozark on August 10, 1936; the record low is −29 °F (−34 °C) at Gravette, on February 13, 1905. [16] Arkansas is known for extreme weather and frequent storms.