CK-12 Foundation
Ck 12: Earth Science: Sedimentary Rocks
[Free Registration/Login may be required to access all resource tools.] Describes how sediments weather, erode, and are deposited in a sedimentary environment.
CK-12 Foundation
Ck 12: Earth Science: Principle of Horizontality
[Free Registration/Login may be required to access all resource tools.] Rules for sedimentary rock formation.