Big Muddy River Here the outline of the Wisconsinan Era lake bed is evident in what were the northern reaches of the ancient lake, where the lake bed was only a few hundred feet wide. The steep Illinoian hills are suddenly truncated where they meet the flat bottom of the Wisconsinan Era lake bed. Here the tributaries of the Big Muddy are tiny, intermittent streams, meandering though these narrow valleys at the headwaters. The Big Muddy basin contains a significant portion of the planet's coal reserves. Most of this is hidden under its deep mud. At a few places the river has eroded
Big Sandy River (Arizona) Big Sandy River (Arizona) The Big Sandy River is both an intermittent and perennial stream in Mohave and La Paz counties in northwestern Arizona in the United States. It begins where Cottonwood Wash and Trout Creek converge in the Hualapai Indian Reservation east of U.S. Route 93 then flows past Wikieup south of Kingman. The Big Sandy River then passes the Signal Ghost Town Site, meanders through the Arrastra Mountain Wilderness, and joins the Santa Maria River in Southern Mohave County to form the Bill Williams River. The Bill Williams River then empties into Alamo Lake State Park. The Big