A cap rock is called this because it is a resistant layer that armors the sediments below it from erosion.
(A cap rock; is called; because it is a resistant layer) (it; is; a resistant layer that armors the sediments below it from erosion) (a resistant layer; armors; the sediments below it; from erosion)
A cap rock it a resistant layer
is called is armors
because it is a resistant layer
a resistant layer that armors the sediments below it from erosion
the sediments below it from erosion