Sandstone with lots of matrix is termed badly sorted. If matrix quantities to much more than ten per cent from the rock, it is termed a wacke ("wacky"). A well-sorted sandstone (minimal matrix) with small cement is named an arenite. Yet another way to have a look at it is http://sandstoneblocksorange58988.theobloggers.com/17117525/fascination-about-natural-sandstone-central-west