The sediments come mostly from pre-existing rocks which have been broken up and then transported by water, wind, or glacier ice. Rocks formed from such sediments are clastic sedimentary rocks and may be subdivided by size into three groups: argillaceous , arenaceous , and rudaceous .
(Rocks; may be subdivided; into three groups: argillaceous , arenaceous , and rudaceous) (pre-existing rocks; have been broken up; ) (pre-existing rocks; transported; T:then) (Rocks; formed; from such sediments) (Rocks; are; clastic sedimentary rocks) Context(Rocks are,List([129, 165))):(The sediments; come mostly; from pre-existing rocks)
Rocks are,List([129, 165))
Rocks pre-existing rocks pre-existing rocks Rocks Rocks The sediments
may be subdivided have been broken up transported formed are come mostly
into three groups: argillaceous , arenaceous , and rudaceous
T:then
from such sediments
clastic sedimentary rocks
from pre-existing rocks