A product that is important as a raw material in developed economies; a product consumed in its primary (i.e., unprocessed) state (see Staple Product). Primary Sector:

The mass of rocks and finely ground material carried by a glacier, then deposited when the ice melted. Creates an unstratified material of varying composition. Glaciation:

The mass of water vapor in the atmosphere per unit of volume of space. Accessibility:

A very large body of atmosphere defined by essentially similar horizontal air temperatures. Moisture conditions are also usually similar throughout the mass. Alluvia:

A hard coal containing little volatile matter. Arete:

A deep gully cut by a stream that flows only part of the year; a dry gulch. A term normally used only in desert areas. - B -

Very irregular topography resulting from wind and water erosion of sedimentary rock. Base Level:

A very large body of igneous rock, usually granite, that has been exposed by erosion of the overlying rock. Bedrock:

The ability to use either one of two languages, especially when speaking. Biological Diversity:

The animal and plant life of a region considered as a total ecological entity. Bituminous: