Rock (geology) arkoses (12%). Sedimentary rocks often contain fossils. Sedimentary rocks form under the influence of gravity and typically are deposited in horizontal or near horizontal layers or strata and may be referred to as stratified rocks. A small fraction of sedimentary rocks deposited on steep slopes will show cross bedding where one layer stops abruptly along an interface where another layer eroded the first as it was laid atop the first. Metamorphic rocks are formed by subjecting any rock type—sedimentary rock, igneous rock or another older metamorphic rock—to different temperature and pressure conditions than those in which the original rock was
Heat capacity either by adding heat to the system or by the system performing work. Written mathematically we have or For work as a result of an increase of the system volume we may write If the heat is added at constant volume, then the second term of this relation vanishes, and one readily obtains This defines the "heat capacity at constant volume", "C", which is also related to changes in internal energy. Another useful quantity is the "heat capacity at constant pressure", "C". This quantity refers to the change in the "enthalpy" of the system, which is given by A small