Sima believed to be outermost rock layer under deep, permanent ocean basins, such as Pacific. Originally sima considered basaltic in composition, with specific gravity of about 3.0. It has been suggested also, however, that it may be peridotitic in composition, with specific gravity of about 3.3. Average specific gravity , 3.0 to 3.3. Also called slope failure.
Soil varies with climate, plant and animal life, time, slope of land, and parent material.
May be crystalline , glassy , or amorphous . Characteristic of saturated soils in high latitudes. In crystalline structure of mineral , three-dimensional array of points representing pattern of locations of identical atoms or groups of atoms constituting a mineral's unit cell . There are 230 pattern types. Has been isolated from land by erosion and weathering concentrated behind end of a headland.