A CONTRIBUTION TO THE EVOLVING STRATIGRAPHIC FRAMEWORK OF MIDDLE PERMIAN STRATA OF THE DELAWARE BASIN, TEXAS AND NEW MEXICO

摘要: We propose a new scheme for correlation of upper Leonardian through Guadalupian units the Permian Basin and focus on two key correlations within older, San Andres equivalent, portion this succession. The lower Formation Algerita Escarpment is here considered equivalent to uppermost Victorio Peak western not Cutoff as proposed by earlier workers. This revised derived from extensive measured section data Escarpment, Brokeoff Mountains, Mountain Western conodont biostratigraphic Lawyer Canyon Escarpment. Conodont data, when reconciled with existing fusulinid Canyon, establish position Leonardian-Guadalupian boundary well support that was originally lithostratigraphic correlation. A second involves platform carbonates bypass surfaces coeval basinal Brushy Cherry siliciclastics. assert shelf voluminous sandstone succession reflected single surface recorded first widespread karstic Andres. basinward shift in rampcrest facies tract at least 5 mi also occurs across karst-modified sequence boundary, emphasizing significance stratigraphy. 100 ft below Lovington sandstones, which are turn tied or Tongue. Thus, occur depositional sequence, one base, middle,