Comparison of the Chesterian Age Channel Deposits in Haskell and Seward County Kansas to the Chesterian Age Surprise Canyon Formation in the Grand Canyon, Arizona
It appears that the 150 feet thick estuarine channel deposits discovered at South Eubank Field, Haskell and Seward County, Kansas are similar to the Chesterian Age Surprise Canyon Formation in the Grand Canyon, Arizona. The Surprise Canyon Formation is exposed as isolated channel deposits approximately 250 feet thick in the walls of the western Grand Canyon. The Surprise Canyon Formation can be divided into three units: a basal conglomerate, sandstone and siltstone unit, a middle limestone unit and an upper siltstone/sandstone unit. Cores from the South Eubank Field, Kansas show that the productive sandstones are similar to the upper tidal-dominated sandstone interval located in the 168 feet thick Fern Glenn Valley in the central Grand Canyon. Using the Surprise Canyon Formation as a predictive model it can be assumed that large flood and ebb tidal channels similar to one found in the western Grand Canyon may exist south of the channel deposits in Seward County Kansas.
AAPG Search and Discovery Article #90176©AAPG Mid-Continent Meeting, Wichita, Kansas, October 12-15, 2013