luestion 4: The following statements concern clastic sedimentary rocks check all that are correct): Their dominant grain composition is invariably quartz The electrical conductivity of sandstones is sensitive to throat sizes Their electrical resistivity is affected by presence of laminated shale Shale permeability is negligible The lateral extent of sandstones depends on the sedimentary environment All shales function as pressure seals Most shales include fresh water in their pore space The electrical resistivity of shales is affected by their porosity