ABSTRACT
Several deep wells west of the granite ridge in east-central Kansas have penetrated red beds and a thick chert zone near the base of the Pennsylvanian section. Study of the materials indicates that the chert, red clay, and other débris are derived from deeply weathered rocks along the granite ridge. Since these coarse deposits overlie fine clay shale of early Pennsylvanian age, it appears that a moderately strong uplift of the ridge occurred in early Pennsylvanian, perhaps late Cherokee time—long after the first uplift of the ridge.
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