Answer: sandstones

AnswerCrossword Clue
SANDSTONESSylvester's least favorite quartz-based rocks?
SANDSTONESGrayish-brown hues
SANDSTONESLight brown shades
SANDSTONESSedimentary materials
SANDSTONESQuartzite and such
sandstonesSedimentary rock consisting of sand or quartz grains cemented together, typically red, yellow, or brown in color
sandstonesSANDSTONE, a clastic sedimentary rock that is lithified sand