Lithology 7. The naming of a lithology is based on the rock type. The three major rock types are sedimentary, igneous, metamorphic. Sedimentary rocks are further classified by whether they are siliciclastic or carbonate. Siliciclastic sedimentary rocks are then subcategorized based on their grain size distribution and the relative proportions of quartz, feldspar, and lithic (rock) fragments. Carbonate rocks are classified with the Dunham or Folk classification schemes according to the constituents of the carbonate rock. The name of an igneous rock requires information on crystal size and mineralogy. This classification can often be performed with a QAPF diagram. Metamorphic rock
Agent study Agent study An agent study is a part of a clinical trial that tests the chemotherapeutic properties of a specific substance. More specifically, an agent study is used to detect whether or not a substance can prevent or inhibit cancer. In a clinical trial, researchers perform multiple studies in order to test the potential of new cancer drugs. An agent study helps determine the potential of a substance to inhibit cancer, before more studies are done in order to further knowledge of this potential. Agent studies are used to determine whether a substance exhibits cytotoxicity or cytostasis. A cytotoxic agent