lower end of the alluvial valley includes the modern Mississippi River delta, a low-lying triangular tract of land formed by sediments deposited at the river mouth (Fig.
(lower end of the alluvial valley; includes; the modern Mississippi River delta) (land; formed; by sediments) (sediments; deposited; at the river mouth)
lower end of the alluvial valley land sediments
includes formed deposited
the modern Mississippi River delta
by sediments
at the river mouth