. An Early Pennsylvanian flora with megalopteris and noeggerathiales from west-central Illinois. Paleobotany; Paleobotany; Megaloptera; Flora (biologie); Fossielen. EARLY PENNSYLVANIA FLORA FROM WEST-CENTRAL ILLINOIS stratigraphy is found in Harvey (196*0, Reinertsen (196*0, and Leary (l9T^a). The Warsaw Shale of Missis- sippian age is the oldest forma- tion observed in the report area. It is exposed in a small creek southeast of the collecting local- ities, several hundred meters southwest of the point where the creek enters the La Moine River. The Warsaw consists primarily of light gray, blu
. An Early Pennsylvanian flora with megalopteris and noeggerathiales from west-central Illinois. Paleobotany; Paleobotany; Megaloptera; Flora (biologie); Fossielen. EARLY PENNSYLVANIA FLORA FROM WEST-CENTRAL ILLINOIS stratigraphy is found in Harvey (196*0, Reinertsen (196*0, and Leary (l9T^a). The Warsaw Shale of Missis- sippian age is the oldest forma- tion observed in the report area. It is exposed in a small creek southeast of the collecting local- ities, several hundred meters southwest of the point where the creek enters the La Moine River. The Warsaw consists primarily of light gray, bluish gray, or green- ish gray calcareous or dolomitic shale. In some places it contains one or more beds of light gray earthy limestone that are massive, lacking obvious bedding planes, and that scale off in thin blocks upon exposure. Thin beds of dolo- stone, siltstone, and sandstone are interbedded with the shale. Contact with the overlying Salem Limestone is gradational. The Salem Limestone is exposed in the area of the collecting lo- calities, forming part of the POPE CREEK COAL BABYLON SS. Covered interval Plant fossils d»W^^/V^^^^^*WyN^t^^^rf WSA^WA^VW^^V^^A^V. z3^^Wi ^ST LOUIS LS. SALEM LS. WARSAW SH. 10 m U Text fig. 3 - Stratigraphic column of the rocks in the vicinity of the Spencer Farm locality. sides of the ravine in which the fossil-bearing Pennsylvanian sediments accumulated. The Salem Formation is predominantly a brown to light brownish gray limestone or dolostone. The limestone is dense to argil- laceous, silty or even sandy, and commonly occurs in irregular thin beds, This limestone or dolostone may give way to a light gray or greenish gray dolomitic siltstone or sandstone, or a light greenish gray calcare- ous or dolomitic sandy shale that closely resembles the Warsaw. The Salem is 10 to ik meters thick. The youngest Mississippian formation in the report area is the St. Louis Limestone. Only part of the formation is present, pre-Penn- sylvanian erosion having
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Keywords: ., bookauthorillinoisstatemuseum, bookcentury1900, booksubjectpaleo
