what is smoothed by contact over long periods of time?
shale earth eras Roads soils water clouds ground
A B C D E F G H
Sandstone, shale, and limestone are sedimentary rocks.
contact between shale over long periods of time causes it to smooth
what is smoothed by contact over long periods of time? (A) shale (B) earth (C) eras (D) Roads (E) soils (F) water (G) clouds (H) ground