Bulletin Scientific Latooratorle* Denison Oniverelty, Vot. XIX 
.flLATE XIXA 
Map showing structural drainage aveasiin southwestern portion of Pavrhuska qliadlaidgle,iQklahomaL .iShaided areas are 
inverted traps foEt oil and gas within closed contours; arrows indic^U direotion o? migration of ioil and gasl 
