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The Geology of the Penner Gorge Section and Petrography and Genesis of the Rock
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alluvium appears aquifers associated banded basic basin beds belt Bengal Bihar block bodies boreholes cause changes clay coal seams collected colour comparatively concentration considered consists contain curves deposits depth described detailed direction district drilling east electrical logging epeirogeny evidence faults feet field Figured foraminifera formation Geol geological Geological Survey given grains hematite hematite-quartzite hills increase India indicate iron iron-ore Jones known length less lignite limestones lower Madras mainly massive material miles mineral nature Nummulitic observed occur origin places Plate Pleistocene possible present quartz quartzites Range recent recorded REFERENCES region resistivity Rhamphorhynchus rise river rocks samples sand sandstones sediments seen sericite shales side South species specimens stage structure suggested surface Surv Survey of India temperature Tertiary thickness tion total dissolved solids Type Upper West zone