Body: People who study "Structural geology" investigate the study of three-dimensional distribution of rock units with respect to their deformational histories.
Why study "Structural geology"? uncover information about history of deformation in rocks, understand stress field that resulted in observed strain and geometries.
Some subfields in "Structural geology" include applications, methods, geometries, kinematics, stress fields.
Professionals of "Structural geology" include William L. Russell, M. King Hubbert, B.A. van der Pluijm, S. Marshak.