Physical Geography

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Entry Category: Physical Geography - Starting with W

Waterfalls

Waterfalls often form as a stream flows over different bands of rock, with the soft rock eroding more quickly to undercut the hard rock. Unsupported, the overhanging rock eventually collapses. This fallen rock crashes down into a pool of water where the water’s swirling action results in more erosion. Over time, this process is repeated, resulting in a series of stair-step waterfalls retreating up a hillside. Nature creates an array of different types of vertical water runoffs. Experts have different ideas about what constitutes a waterfall. Although there are no definitive criteria, two methods have been developed to categorize waterfalls. Geometrical Classification categorizes waterfalls based on shapes and physical features. This method is helpful to identify falls for their visual …

White River

The 722-mile-long White River flowing through northern Arkansas and southern Missouri is a major tributary of the Mississippi River. The river begins in northwestern Arkansas in the Boston Mountains and flows east toward the Fayetteville (Washington County) area, where it then turns north. Near Eureka Springs (Carroll County), the river enters Missouri. It then flows southeast back into Arkansas past Bull Shoals (Marion County), Mountain Home (Baxter County), and Calico Rock (Izard County). At Batesville (Independence County) begins the second section of the river, known as the lower White. From Batesville, the White River flows south for 295 miles through Arkansas’s Delta region, past Augusta (Woodruff County), Des Arc (Prairie County), Clarendon (Monroe County), and St. Charles (Arkansas County), before …