J Sandstone  search
UFMuddy J Formation
RTLower Cretaceous
 Miocene
 Wyoming
 Colorado
 Kansas
 Malaysia
 Denver Basin
 Muddy Sandstone
SNInformal, Lower Cretaceous of Muddy Sandstone in the Denver Basin, Colorado, Kansas, and Wyoming. Also Miocene of the Malay Basin. Indexed with age as applicable. Added to Thesaurus in 1995.