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This study of the uppermost part of the Pennsylvanian sequence and the lower part of the Permian sequence of rocks in Kansas has been made to describe the several geologic units and to investigate the placement of the systemic boundary. In describing the stratigraphy of the geologic units from the Dover limestone member of the Stotler limestone (upper Pennsylvanian) up to and including the Beattie limestone (lower Permian) particular attention has been given to the lithologic and paleontologic characteristics of each bed as it is traced southward across the State. The upper Pennsylvanian and lower Permian rocks differ from upper Permian beds in that sandstone, sandy shale, and sandy channel fillings are relatively common. Thin beds of coal are common in the upper part of many of the shale units except those in the Council Grove group. Within this group, coal is found locally in the Eskridge shale. Most lower Permian shale beds are variegated. These variegated beds are generally more abundant in the central and northern outcrop areas; however, in the Council Grove group they are thicker and more abundant in the southern outcrop area. The formations and members that change considerably in facies from north to south are the limestones called Aspinwall, Falls City, Five Point, Americus, Bed Eagle, Grenola, Cottonwood and Morrill, and the shales called Hughes Creek and Bennett. The most noticeable changes are in the Hughes Creek and the Bennett, which are predominantly shale in the northern outcrop area but are limestone in the southern outcrop area. The Dover and the Americus are redefined. In the southern part of the State the Dover is a single bed of algal limestone rather than 3 beds of limestone and 2 of shale. The Americus is redefined to include 3 beds of limestone in the southern part of the State and 2 beds in the northern part. The lower shale bed pinches out in Wabaunsee County, and the lower limestone bed coalesces with the next younger bed of limestone. In general, the geologic units thicken as much as 110 feet toward the south. The upper part of the Wabaunsee group thickens about 55 feet toward the south. The Admire group maintains an equal thickness of about 110 feet in the northern and southern outcrop area, but it thickens in the central outcrop area. The rest of the Permian rocks studied thicken as much as 55 feet to the south. Most of this thickening is in the Foraker, Bed Eagle, and Grenola limestones. Marine fossils were systematically collected from all rock units bearing them. The fusulinids in the Brownville through Americus interval were studied extensively by B. C. Douglass. Eight species of fusulinids are described, of which Triticites brownvillensis from the Brownville limestone member of the Wood Siding formation and Pseudofusulina delicata from the Five Point limestone member of the Janesville shale are new. Crinoid calyxes were examined by H. L. Strimple. Seven new species are described: Delocrinus admirensis, D. densus, D. doveri, Endelocrinus rotundus, Oklahomacrinus cirriferous, Aesicrinus prudentia, Graphiocrinus"! kansasensis. The coral fauna is discussed by Helen Duncan. Cephalopods collected are discussed by Mackenzie Gordon, Jr.; vertebrate remains are listed by D. H. Dunkle. The remainder of the fauna, except for the bryozoans and ostracodes, are listed or discussed. These are primarily brachiopods, with lesser numbers of pelecypods and gastropods. Several new species are noted, but only Wellerella cooperi is named. Distribution data are summarized on one chart. Most of the fossils that are discussed are also illustrated. In spite of these regional changes, most units are of nearly constant thickness locally. Because of this constancy it has been possible to differentiate types of lithologic and paleontologic assemblages. Three main divisions based on fossils are shale and shaly limestone with brachiopods, argillaceous limestone witM pelecypods, and limestone and calcareous shale with fusulinids. There is little evidence that the sediments were agitated and that the fossils were subjected to much transportation. All organisms are believed to have lived in shallow water, but depth is not considered to be a controlling factor in their distribution. Abrupt faunal changes, coupled with lithologic changes, indicate that southern Kansas may have been covered by slightly deeper water than the northern Kansas area. In the absence of clear agreement on the position of the systemic boundary in the Permian type area of Bussia, any boundary established in Kansas must be considered as tentative. Beds above and below the Five Point limestone member of the Janesville shale are of two slightly different types. Channel-sandstone or sheet-sandstone beds are known from shale beds in the Pennsylvanian rocks and in those of the Admire group of the Permian. The distribution of most larger invertebrates is inconclusive as to placement of a boundary anywhere within the interval studied. The boundary has traditionally been placed locally below the oldest occurrence of Pseudofusulina, a genus characteristic of the early part of the PseudoscJiwagerina zone. Pseudofusulina first appears in the Five Point limestone member of the Janesville shale. As the next older fusulinid fauna that is found in the Brownville limestone member of the Wood Siding formation indicates Pennsylvanian age, the systemic boundary may lie between these two units. Because of this, and the absence of other conclusive evidence, it is recommended that the boundary be placed at the top of the Brownville limestone member of the Wood Siding formation, the boundary commonly accepted by the Kansas, Nebraska, and Oklahoma Geological Surveys for the last 20 years.

Stratigraphy and paleontology of the uppermost Pennsylvanian and lowermost Permian Rocks in Kansas