Origin and Chronologic Significance of Late Quaternary Terraces, Ouachita River, Arkansas and Louisiana,
Abstract
Efforts to differentiate Quaternary alluvial deposits along the Ouachita River between Camden, Arkansas, and Monroe, Louisiana, according to environments of deposition have indicated the presence of five fluvial terraces, three of which are considered to comprise the Deweyville terrace sequence. This sequence, lying stratigraphically between the Prairie terrace and the Holocene Floodplain, can be distinguished partly by large meander that are characteristic of the terrace where it is present on several Coastal Plain streams. Previous investigations have established the age of the Deweyville terraces as being between 13,000 and 30,000 years before present; however, opinions vary regarding mode of origin. Morphologic characteristics of and stratigraphic relationships between the terraces along the Ouachita River indicate that a close causal relationship existed between the terraces and major episodes of aggradation and degradation in the Mississippi alluvial valley, but changes in hydraulic regimen brought about by climatic change were also significant. Color illustrations reproduced in black and white.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1970
- Accession Number
- ADA033142
Entities
People
- A. R. Fleetwood
- R. T. Saucier