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
Flint Adolescent Study and experiences of parents and how they influence their parenting attitudes and behaviors over time. The study is also examining how these factors may influence substance use in their children (G2). Flint Adolescent Study The Flint Adolescent Study (FAS) is a longitudinal interview study of risk and promotive factors associated with alcohol, tobacco and other drug use across a lifetime. The study is led by Marc A. Zimmerman, Ph.D., Director of the Prevention Research Center and the Michigan Youth Violence Prevention Center at the University of Michigan School of Public Health. Hsing-Fang Hsieh, PhD, Research Investigator at the UM School