The shape of the Earth’s relief and the geomorphologi-cal convergence problem. The shape of the Earth’s relief is the subject matter of this paper. The Earth’s relief may be represented as a large mosaic whose pieces are the slopes. A slope is a planar or curved surface. A single slope is also a well-defined landform whose genesis is due to a peculiar geomorphic process. Changes in exposure, inclination or curvature of a slope mark the transition to a different landform. Overall, geomorphic processes causing the Earth's surface create large and small landforms that always show the same geometries, though they are produced by deeply different mechanisms. This occurrence is known as geomorphological con-vergence problem creating difficulties in distinguishing similar but deeply different in genesis landforms. Regardless of the geo-morphic process that produce them, the simple landforms (a single slope) may assume the following geometric shapes: scarp (vertical planar surface), inclined slope (oblique planar surface), plain (hor-izontal planar surface), rounded hollow (concave curved surface) or rounded hill (convex curved surface). Complex landforms (a set of slopes) take on by the combination of two or more simple land-forms. The complex landforms can assume the appearance of topo-graphic high (a set of slopes converging toward higher altitudes), topographic depression (a set of slopes converging toward lower altitudes) or articulate relief (a set of several slopes which are dif-ferently combined). Starting from the shape of the Earth's surface, this paper shows landform causes, main landforms in relation to the scale factor, and most significant cases of geomorphological convergence.
|Numero di pagine||26|
|Rivista||QUADERNI DI RICERCA IN DIDATTICA|
|Volume||Numero Speciale N.1|
|Stato di pubblicazione||Published - 2018|