Here are a few basic references to get you started:

• Rabbitt, M. C. (1979-1980) Minerals, Lands and Geology for the Common Defense and General Welfare, U. S. Geol. Survey, (v. 1 – Before 1879; v. 2, 1879-1904). It is written in an annoying fashion – information is arranged more or less chronologically not thematically. However, each volume contains one index devoted to people, and a separate listing of references for individual scientists. Located in the stacks: QE 76.R3
• Dictionary of Scientific Biography (approx. 18 vols.) – This is the single most useful quick source for a lot of information on most important scientific figures. Articles are generally several pages in length. Located in the Reference Room: Q141.D5
• Modern Men of Science (1966-68). Encyclopedic compendium of great reference value but contains fewer biographies than the Dictionary. Mostly 20th century. Located in the stacks: Q 141.M15
• American Men and Women of Science. The current edition is in the Reference Room: Q 141 .A47. It has very brief bibliographical data on living American scientists. As such it will probably not be useful in at this time. (It is worth knowing about in case you ever need to introduce someone.)
• National Academy of Science Biographical Memoirs (stacks: Q 141.N2). Has a cumulative index that can help you quickly locate a memoirs.
• GSA Memorials (stacks: QE 21.G46a) started in early 1970s. This reference is very useful in that time frame.

In addition, there are biographies about many individual geologists.

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