TY - RPRT TI - Quaternary grabens in southernmost Illinois: Deformation near an active intraplate seismic zone AU - W.J. Nelson AU - F.B. Denny AU - L.R. Follmer AU - J.M. Masters PY - 1999 DO - 10.1016/s0040-1951(99)00018-9 UR - https://pubs.usgs.gov/publication/70021646 ID - 70021646 ER -