Crust (geology) the crust. The boundary between the crust and mantle is conventionally placed at the Mohorovičić discontinuity, a boundary defined by a contrast in seismic velocity. The crust of the Earth is of two distinctive types: Because both continental and oceanic crust are less dense than the mantle below, both types of crust "float" on the mantle. This is isostasy, and it's also one of the reasons continental crust is higher than oceanic: continental is less dense and so "floats" higher. As a result, water pools in above the oceanic crust, forming the oceans. The temperature of the crust increases with
Bulletin of Engineering Geology and the Environment and groundwater conditions of geological formations; characterization of the mineralogical, physico-geomechanical, chemical and hydraulic properties of earth materials involved in construction, resource recovery and environmental change; assessment of the mechanical and hydrological behavior of soil and rock masses; prediction of changes to the above properties with time; determination of the parameters to be considered in analyzing the stability of engineering works and earth masses; maintenance of the environmental condition and properties of the terrain. Bulletin of Engineering Geology and the Environment The Bulletin of Engineering Geology and the Environment is a peer-reviewed scientific journal covering research in geoscience. It is