Kansas Geological Survey, Current Research in Earth Sciences, Bulletin 243, part 1
Sedimentology and Ichnology of Paleozoic Estuarine and Shoreface Reservoirs, Morrow Sandstone, Lower Pennsylvanian of Southwest Kansas, USA

Fig. 3. Isopach map of the lower Morrow Sandstone in the Arroyo field showing location of Kendrick 23-1 and Fretz 16-1 wells. Contour interval = 10 feet (3 m).