geomorphic component - hills


geomorphic component - hills
   A set of fundamental, three-dimensional areas and positions that geomorphically define a hill or ridge. In descending topographic order, the geomorphic components are interfluve (stable summit area) ; crest (unstable summit -converged shoulders); three geometric slope areas defined by plan shape and its influence on overland flow and throughflow: These are: head slope (convergent flow), side slope (parallel flow), and nose slope (divergent flow); free face (rock outcrop); and base slope (concave accretion area (colluvium / slope alluvium) at hill bottom).
   SW

Glossary of landform and geologic terms. 2013.

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  • geomorphic component - flat plains —    A group of fundamental, three dimensional pieces or areas of flat plains.    In descending elevational order, the geomorphic components of a simple, flat plain (e.g., lake plain, low coastal plain, etc.) are the rise [ a broad, slightly… …   Glossary of landform and geologic terms

  • geomorphic component - mountains —    A group of fundamental, three dimensional pieces or areas of mountains. In descending elevational order, the geomorphic components of a simple mountain are the mountaintop (roughly analogous to the crest or summit); mountainflank (the long… …   Glossary of landform and geologic terms

  • geomorphic component - terraces, stepped landforms —    A group of fundamental, three dimensional pieces or areas of terraces, flood plain steps, and other stepped landforms (e.g., stacked lava flow units). In descending elevational order, the geomorphic components are the tread (the level to… …   Glossary of landform and geologic terms

  • mountainbase —    A geomorphic component of mountains consisting of the lowermost area, consisting of the strongly to slightly concave colluvial apron or wedge at the bottom of mountain slopes; composed of long transport colluvium and slope alluvium sediment.… …   Glossary of landform and geologic terms

  • mountainflank —    A geomorphic component of mountains consisting of the side area of mountains, characterized by very long, complex backslopes with comparatively high slope gradients and composed of highly diverse, colluvial sediment mantles, complex near… …   Glossary of landform and geologic terms

  • mountaintop —    A geomorphic component of mountains consisting of the uppermost, comparatively level or gently sloped area of mountains, characterized by relatively short, simple slopes composed of bare rock, residuum, or short transport colluvial sediments.… …   Glossary of landform and geologic terms

  • dip —    1) [ soil survey ]    A geomorphic component (characteristic piece) of flat plains (e.g., lake plain, low coastal plain, low relief till plain) consisting of a shallow and typically closed depression that tends to be an area of focused… …   Glossary of landform and geologic terms

  • rise —    1) [ soil survey ]    A general term for a slight increase in slope (e.g., d 3%) and elevation of the land surface, usually with a broad, low summit and gently sloping sides. The term is restricted to landforms and microfeatures in areas of… …   Glossary of landform and geologic terms

  • riser —    [ geomorphology ]    A geomorphic component of terraces, flood plain steps, and other stepped landforms consisting of the vertical or steep side slope (e.g., escarpment) typically of minimal aerial extent. Commonly a recurring part of a series …   Glossary of landform and geologic terms

  • talf —    [ geomorphology ]    A geomorphic component of flat plains (e.g., lake plain, low coastal plain, low gradient till plain) consisting of an essentially flat (e.g., 0 1 % slopes) and broad area dominated by closed depressions and a non… …   Glossary of landform and geologic terms

  • tread —    [ geomorphology ]    A geomorphic component of terraces, flood plain steps, and other stepped landforms consisting of the flat to gently sloping, topmost and laterally extensive slope. Commonly a recurring part of a series of natural, step… …   Glossary of landform and geologic terms