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
Zhao Wenzhi University. He served two terms (2001–2011) as chief scientist of natural gas project of the State Basic Research Program of China (also called 973 Program). Zhao organized the study of lithology-related oil/gas accumulation theory and evaluation technology from 1997 to 2005, focusing on hydrocarbon accumulation with large scale in the flat and tectonic low areas in faulted sag-type, depression-type and foreland-type sedimentary basins. He has established the theory of large-scale lithology-related oil/gas accumulations with medium-low abundance, which helps to expand the exploration activity from the limited structural highs to the wide-ranged depressions. As a result, abundant oil and gas reserves