. Bulletins of American paleontology. 30 Northwestern Penna. : Caster 30 port), and the uppermost portion of the Chautauquan series. Only the former is of primary importance in this investigation,. NEW YORK Jahestovm _,iS'-^"* Braoforo PENNSYLVANIA Fig. 6.—^Showing the locations of the sections analyzed in the fol- lowing diagrams of facies relationship. for the Chautauquan rocks are largely subsurficially developed in northwestern Pennsylvania. Within the Venango stage the respective parvafacies which are 11 10 9 8 7 6 5 4 3 2 1 DC VIII VII VI v III II I E E E y -<y C ^nX \y Y Y Y E E
. Bulletins of American paleontology. 30 Northwestern Penna. : Caster 30 port), and the uppermost portion of the Chautauquan series. Only the former is of primary importance in this investigation,. NEW YORK Jahestovm _,iS'-^"* Braoforo PENNSYLVANIA Fig. 6.—^Showing the locations of the sections analyzed in the fol- lowing diagrams of facies relationship. for the Chautauquan rocks are largely subsurficially developed in northwestern Pennsylvania. Within the Venango stage the respective parvafacies which are 11 10 9 8 7 6 5 4 3 2 1 DC VIII VII VI v III II I E E E y -<y C ^nX \y Y Y Y E E E •^ -^D y^ XY Y Y E f^ V^ C c c^\a ^^x x\y Y E A Fig. 7.—Analysis of representative stratigraphic sections in western Pennsylvania and eastern Ohio in terms of facies components. The let- ters refer to the designations made on figure 3, above. The meridians along which sections were selected are as follows: 1—east of Potter County, Pennsylvania; 2—eastern Potter County; 3—western Potter County; 4—eastern McKean County approximately on the meridian of Smethport; 5—section along a line from Clean, New York to Bradford, Pennsylvania; 6—section in the vicinity of Warren, Pennsylvania; 7— Meadville, Pennsylvania; 8—eastern Ohio to the state line; 9—the meri- dian of Painesville, Ohio; 10—the meridian of Cleveland, Ohio; 11— area immediately west of Cleveland, Ohio. The Roman numerals on the left refer to strata. Numbers from I through III represent strata of the upper Chautauqua series; IV through IX represent stages of the Cone- wango series. The apparent eastward overlap of the Cleveland shale magnafacies "E" in the west from VI through IX is interpreted as a reversion of facies provinces, a phenomenon explained Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Pale
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