Who is Pettijohn, Francis John (1904–1999) American Sedimentologist

Field Geologist Francis Pettijohn was born in

Waterford, Wisconsin, on June 20, 1904, and is widely

known as the “Father of Modern Sedimentology.” He graduated

from high school in Indianapolis in 1921, then entered

the University of Minnesota where he received his B.A. in

1924 and his M.A. in 1925. In 1927 he entered graduate

school at the University of California at Berkeley and then

transferred to the University of Minnesota, where he received

his Ph.D. in 1930.

Pettijohn is most famous for his studies of the sedimentology

of the rocks in the Appalachian Mountains, and for

the 24 books that he authored or coauthored. Perhaps his

most famous book is Sedimentary Rocks, which has been

reprinted many times since its first publication in 1949 and

remained a standard in the field for more than 50 years.

Francis Pettijohn published his own autobiography in 1984,

a humorous and anecdotal work entitled Memoirs of an

Unrepentant Field Geologist.

Pettijohn received numerous awards for his work, including

the Sorby Medal of the International Association of Sedimentologists

in 1983, the Twenhofel Medal from the Society

of Economic Paleontologists and Mineralogists, the Wollaston

Medal from the Geological Society, the Penrose Medal from

the Geological Society of America, the Francis J. Pettijohn

Medal from the Society for Sedimentary Geology, and an

Honorary Doctorate of Science from the University of Minnesota.

He was active in professional life, serving as president

of the Society of Economic Paleontologists and Mineralogists

and councilor of the Geological Society of America. Pettijohn

was elected a member of the National Academy of Sciences

and a Fellow of the American Academy of Arts and Sciences.

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