Geologic Field Mapping: Grassroots geology helps solve surface problems and find mineral deposits (GC-06)
Geologists locate and study rock formations and unconsolidated materials throughout the state to prepare maps and reports that show their location, describe them, and explain how they relate to each other. Hammer, hand lens, acid bottle, compass, and altimeter are among the basic tools used by the field geologist. Often he must thrash through briars, ford streams, and climb hills to reach, study, and identify a distinctive outcropping or exposure. Geologic maps define the limits of possibly hazardous foundation conditions; provide basic information needed for environmental, urban, and industrial planning; and show the most likely locations of commercial mineral deposits. Interpretative discussions and cross sections enable planners, architects, highway and construction engineers, soil scientists, and others to use geologic information on the maps and in their reports.

Our Hoosier State Beneath Us: Geochemistry/Geophysics