Paleomagnetic projects in Texas, Oklahoma, Arkansas, and Kansas include many examples where Applied Paleomagnetics provided paleomagnetic services to petroleum and geotechnical companies since 1986. Our paleomagnetic projects in Texas, Oklahoma, Arkansas, and Kansas include extensive use of our paleomagnetic core orientation service to determine natural fracture, bedding, and in situ stress orientations in oil and gas fields. In the Permian Basin and Delaware Basin, west Texas, our paleomagnetic projects focused on paleomagnetic core orientation in the following formations: Canyon, Cisco, Wolfcamp, Avalon Shale, Dean, Spraberry, Clear Fork, Glorieta, San Andres, Grayburg, Queen. In the East Texas Basin, our paleomagnetic projects focused on paleomagnetic core orientation in the Cotton Valley and Travis Peak formations and in the Haynesville Shale. In the Arkoma Basin in Oklahoma and Arkansas, our projects emphasized paleomagnetic core orientation in the Wapanucka, Spiro, and Atoka formations along the Choctaw fault. In the Anadarko Basin and in central Oklahoma, our paleomagnetic projects involved paleomagnetic core orientation in the Red Fork and Sycamore formations. In south Texas, our projects focused on paleomagnetic core orientation of Austin Chalk, San Miguel, and Vicksburg formations. Along the Nemaha Ridge in Oklahoma and Kansas, our paleomagnetic projects involved paleomagnetic core orientation of the following formations: Bartlesville, Hoxbar, Tonkawa, Shawnee, Red Eagle, Fort Riley, and late Precambrian sediments in the Noel Poersch well. In the San Andres, Grayburg, Spiro, Wapanucka, Travis Peak, Cotton Valley, and Austin Chalk formations in Texas and Oklahoma, we paleomagnetically oriented natural and induced fractures in fractured reservoirs. Along the Choctaw fault in Oklahoma and Arkansas, we measured magnetic properties and performed tectonic rotation studies to constrain timing of hydrocarbon migration relative to development of structural traps along the fault. Our paleomagnetic sedimentology projects in this region include paleomagnetic orientation of cross-beds and sediment transport directions in Bartlesville sandstone in Kansas; in the Vicksburg Formation, south Texas; and in Norphlet Fm eolian sandstone offshore Louisiana in the Gulf of Mexico. We determined structural dip by paleomagnetically orienting bedding in Austin Chalk in south Texas, in the Sycamore Formation of southern Oklahoma, and in Norphlet sandstone offshore Louisiana.