Francis John Pettijohn (June 20, 1904 – April 23, 1999) was an Americangeologist who served for many years on the faculty ofJohns Hopkins University.^[1]

Pettijohn received his doctorate from theUniversity of Minnesota in 1923 based on a study ofPrecambriansedimentology andstructure of an area aroundAbram Lake,Ontario.^[1] In 1929 he obtained a position at theUniversity of Chicago. He became a full professor there in 1949.^[1] In 1943 he published an important work onArchaean sedimentation.^[1][2] In 1952 he moved to Johns Hopkins University where he remained until retirement in 1973.

He received thePenrose Medal from theGeological Society of America in 1975.^[3] Other awards include theTwenhofel Medal of theSociety of Economic Paleontologists and Mineralogists, theWollaston Medal of theGeological Society of London and theSorby Medal of theInternational Association of Sedimentologists.^[1]Francis J. Pettijohn medal fromSociety for Sedimentary Geology in 1992

• Paleocurrents and Basin Analysis, Springer (1963; 1977)ISBN 978-3-540-07952-1
• Sand and Sandstone, Springer (1972)ISBN 978-3-540-05528-0
• Sedimentary Rocks, Harpercollins; 3rd edition (1983)ISBN 978-0-06-045191-2
• Atlas and Glossary of Sedimentary Structures, Springer Verlag (1964)ISBN 978-0-387-03194-1
• Memoirs of an Unrepentant Field Geologist, University of Chicago Press (1984)ISBN 978-0-226-66403-3
• Studies of Appalachian Geology: Central and Southern, editor, Wiley (1970)ISBN 978-0-471-26142-1

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