Table of Contents
- 1 How was the Arkansas Valley formed?
- 2 What caused the area of north Arkansas to be uplifted?
- 3 What rivers are in Arkansas River Valley?
- 4 Where is the river valley in Arkansas?
- 5 What landforms are in the Arkansas River Valley?
- 6 What is the geology of the Arkansas River valley?
- 7 Where are igneous dikes and sills in Arkansas?
How was the Arkansas Valley formed?
The Formation of the Arkansas River Over the next 40 million years, rain and snow runoff sculpted the rocks, creating jagged cliffs and sweeping valleys. At around 29 million years ago, the Arkansas River valley formed.
What caused the area of north Arkansas to be uplifted?
For instance, as the North American plate collided with the European plate, the Appalachians were formed, and a similar collision with the super continent of Gondwana (comprising the present continents of South America, Africa, Antarctica, and other land masses) provided the forces that caused the area of north …
What is the source of the Arkansas River?
Rocky Mountains
Arkansas River/Sources
What are 3 characteristics of the Arkansas River Valley?
However, some features are characteristic of the Arkansas Valley itself, including isolated, flat-topped, steep-sided mesas like Petit Jean Mountain, Mount Nebo, and Mount Magazine.
What rivers are in Arkansas River Valley?
| Arkansas River | |
|---|---|
| River system | Mississippi River watershed |
| Tributaries | |
| • left | Fountain Creek, Pawnee River, Little Arkansas River, Walnut River, Verdigris River, Neosho River |
| • right | Cimarron River, Salt Fork Arkansas River, La Flecha, Canadian River, Poteau River |
Where is the river valley in Arkansas?
It is the valley area on the southern edge of the Ozarks between the Ouachita mountains to the south and the Boston and Ozark Mountain to the north. There are rich soils along the Arkansas river and this helps to make the region Wine Country of Arkansas.
Where is the Arkansas River Valley located?
The Arkansas Valley, one of the six natural divisions of Arkansas, lies between the Ozark Mountains to the north and the Ouachita Mountains to the south. It generally parallels the Arkansas River (and Interstate 40) for most of its length.
What is the most important part of the Arkansas River Valley?
The most populous city within the River Valley is Fort Smith, the principal city of the Fort Smith metropolitan area that also includes Van Buren and Alma. Fort Smith is the second-largest city in Arkansas, and serves as a regional hub for culture, health care and transportation.
What landforms are in the Arkansas River Valley?
The Arkansas River Valley is a forty mile wide stretch between the Ozarks and the Ouachitas Mountains. It is characterized by uplifted plateaus, folded ridges and unique mountains with steep sides and flat tops (mesas).
What is the geology of the Arkansas River valley?
This multimillion-year-long process folded and faulted the Ouachita strata into a structurally complex mountain chain. The Arkansas River Valley area is the transition zone between the structurally simple Ozarks and the structurally complex Ouachitas with subdued characteristics in each region.
What kind of rocks are found in Arkansas?
Arkansas is divided into a highland area in the northwest and a lowland region in the south and east. The rocks in the highland area are dominated by well-lithified sandstones, shales, limestones, and dolostones of Paleozoic age.
How big are conodonts in the Arkansas River valley?
Conodonts are present in this formation. The contact with the underlying Collier Shale is considered conformable. Typical thicknesses of the unit range from 500 to 850 feet, but some sites may have less than 50 feet.
Where are igneous dikes and sills in Arkansas?
Most are exposed over 15 square miles, principally in Pulaski, Saline, Hot Spring, Garland, and Pike Counties. A few small igneous dikes and sills are present outside the Ouachita region, mostly in the Arkansas Valley, and in at least one case, in the Boston Mountains.