Circular - Division of the Illinois State Geological SurveyIllinois State Geological Survey., 1938 - Mines and mineral resources |
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average cross-bedding direction average direction Battery Rock Sandstone carbonaceous and arenaceous Caseyville Formation Chesterian Series clastic Clore Top confined to erosional contains appreciable sandstone DEGONIA FORMATION Degonia Sandstone dendritic differential compaction early Pennsylvanian erosional valleys Evansville Valley feet Gallatin County Genevieve Limestone geology and cross-bedding Glen Dean Goreville Cave Hill Goreville Limestone Goreville Member Hardin County Hill Negli Creek Illinois Basin Indiana Kentucky Kinkaid Formation lateral continuity limestone and shale LIMESTONE MEMBER Limestone of Clore Lusk Shale Member Mile Ordovician outcrop mapping peneplain Pennsylvanian sediments Pennsylvanian System Posey Co Posey County Potter pre-Pennsylvanian erosion removed by pre-Pennsylvanian Rock and Pounds sandstone and shale Sandstone fig Sandstones Mississippian Limestones shown in figure siltstone Simplified pre-Pennsylvanian geology southeastern Illinois southern edge southwest southwestward stratigraphic study area sub-Pennsylvanian valley subsidence subsurface and outcrop thick-bedded sandstone thin-bedded three-mile intervals TIIS Top of Limestone transport direction valley fill valley system vector mean Waltersburg Wanless