Other possible derivations include aux arcs meaning "[land]of the arches" and Alum Cove in the Ozark – St. It is even suggested aux arcs is an abbreviation of aux arcs-en-ciel, French for "toward the rainbows" which are a common sight in the mountainous regions.
After the Louisiana Purchase, American travelers in the region referred to various features of the upland areas using the term Ozark, such as Ozark Mountains and Ozark forests.
Together with the Ouachita Mountains, the area is known as the U. "Arkansas" seems to be the French version of what the Illinois tribe (further up the Mississippi) called the Quapaw, who lived in eastern Arkansas in the area of the trading post.
Eventually, the term came to refer to all Ozark Plateau drainage into the Arkansas and Missouri Rivers.
The core of the range existed as an island in the Paleozoic seas.The Ouachita Mountains to the south rise a few hundred feet higher, but are not geographically associated with the Ozarks.The Boston Mountains portion of the Ozarks extends north of the Arkansas River Valley 20 to 35 miles (32 to 56 km) and is approximately 200 miles (320 km) and are bordered by the Springfield and Salem Plateau to the north of the White River.Although the Springfield formation's surface is primarily Mississippian limestone and chert, the Salem Plateau is older Ordovician dolostones, limestones, and sandstones.
Both are rife with karst topography and form long, flat plains.
The Ozarks, also referred to as the Ozark Mountains and Ozark Plateau, is a physiographic region in the U. states of Arkansas, Missouri, Oklahoma, and Kansas.