John B. Reeside, Jr., (1889-1958) was a geologist specializing in the study of the Mesozoic stratigraphy and paleontology of the western United States. While receiving his education at The Johns Hopkins University (A.B., 1911; Ph.D., 1915), he joined the United States Geological Survey (USGS) as a part-time assistant with the field parties mapping coal-bearing areas in North Dakota and Wyoming. Reeside remained with the USGS for his entire professional career. He served in a variety of positions including Assistant Geologist, 1915-1919; Paleontologist, 1919-1920; and Geologist, 1920-1932. From 1932 to 1949, Reeside was Chief of the Paleontology and Stratigraphy Branch. He retired from the post in 1949 to resume full-time research as a geologist. Reeside also served on the USGS Committee on Geological Names from 1929 to 1958, and acted as Chairman from 1947 to 1952. He was an honorary Research Associate in invertebrate paleontology at the United States National Museum from 1944 until his death.
Reeside was internationally recognized as an authority on the Mesozoic stratigraphy and fauna of the western interior of the United States. He was the author of over 70 scientific papers, almost evenly divided between stratigraphy and descriptive paleontology. Three genera and twenty-one species of fossil invertebrates were named in his honor. Reeside was active professionally and served as President of the Geological Society of Washington, 1941; President of the Paleontological Society, 1943; and Vice-President of the Geological Society of America in 1935 and 1944. He was also a member of the Board of Directors of the American Geological Institute, 1948-1949.
For additional biographical information on Reeside see "Memorial to John Bernard Reeside, Jr. (1889-1958)," by Ralph W. Imlay. Proceedings Volume of the Geological Society of America Annual Report for 1954, pp. 173-178. 1959.