... Assignment (2) No Rock Name Origin (clastic, chemical, biochemical) References Journal of Geological Education, 1991,v.39,p.3 82 Petrology of Sedimentary Rocks, Boggs, 19 92 Petrology of Sedimentary ... Preview of Lab Introduction Main minerals of sedimentary rocks Objectives of Lab Classification in general Classification of sedimentary rocks Clastic sedimentary rocks ... Chemical rocks Biochemical rocks Simple Classification of Sedimentary Rocks Modified from Boggs (19 92) Clastic (terrigenous/detrital) Sedimentary Rocks Derived from pre-existing rocks Composed...