Figure 27
Antelope Hills Exposure #1, Section 33-17N-25W, Roger
Mills County, Oklahoma. The same sequence as at Brokenleg Bend #3, but much more
clearly expressed. Note the diffuse lower boundary and abrupt upper boundary of
each soil. These suggest that rainfall and vegetal biomass gradually increased
through each of the four recorded pluvials, as during the modern one (Figure 28
on this website), and that each pluvial terminated in a drought of a severity
that has not been experienced on the Southern Plains during the post-1892
Historic period.