Reaction is extremely acid to strongly acid in the upper part, very strongly acid to moderately acid in the middle part, and very strongly acid to neutral in the lower part. There are no other series in this family. Closely similar soils include Bacliff , China , League , and Vamont series. Bacliff and Vamont soils are strongly to moderately acid in the upper part. China and League soils are Dystruderts and have mollic colors 12 to 40 inches thick.
Beaumont soils are on the broad, nearly level Coastal Prairie east of the Trinity River.
Surfaces are plane or slightly concave and the gradient is less than 1 percent. They formed in clayey flood basin deposits on alluvial plains or deltas on the Beaumont Formation of Pleistocene age. Mean annual temperature ranges from 70 to 72 degrees F. Frost free days range from 250 to 270 and elevation ranges from 5 to 40 feet above sea level. The mean annual rainfall ranges from 50 to 60 inches and the Thornthwaite P-E index ranges from 68 to 80. These are the competing China and League soils and also Harris and Viterbo soils.