a obstruction, occurring in nature, such as a mountain range or a wide river that prevents or hinders movement over it or through it

landscape features that were created by natural processes; for example, rivers and mountains

the location of a point expressed in relationship to the location of other points or in relation to a geographic reference system, such as the USPLS

the unforced or free movement of large groups of people or individuals from their homelands to new areas

a main branch of Christianity, historically centered in Eastern Europe that does not recognize that primacy of the Pope in Rome

a raw material that can be transformed into food

the pattern of the distribution of people over a defined area

using natural resources: farming, fishing, lumbering, mining

a map that represents geographical features so that they appear small and less detailed in comparison to other maps; frequently used to show large features, such as countries and continents, so that t [..]

the top of a hill or mountain top; more generally, the highest point of any landscape feature