Born in southern California in 1919, James Plummer Morgan would emerge
from training at Berkeley and Louisiana State University to make seve
ral profound contributions in the disciplines of deltaic geology and c
oastal geomorphology. As an indirect, academic descendant of William M
orris Davis through Richard J. Russell, Morgan's mentor at LSU, over h
alf a century of research and student training resulted in Morgen maki
ng profound advances in four major areas: (1) loading mechanisms and t
ectonic roles in controlling the geology and geomorphology of deltaic
regions; (2) delta crevassing and subdelta formation; (3) shoreline pr
ocesses particularly related to coastal erosion and marshland loss; an
d (4) coastal hazard mitigation. In this paper we summarize the late D
r. Morgan's scientific contributions which have provided a foundation
for significant advances in the respective fields and provide a select
ed list of scientific publications.