Glossary of landform and geologic terms. 2013.
bowl — [ gilgai ] A cup or trough shaped subsurface morphology centered under and surrounding the microlow of a gilgai, commonly 3 5 m across and 1.5 3 m thick, containing numerous slickensides (oblique slip / shear faces) within it, and bounded… … Glossary of landform and geologic terms
circular gilgai — A type of gilgai dominated by circular closed depressions (microlows) separated by low mounds (microhighs); the prevailing type of gilgai on relatively level terrain (slopes < 3 %). Distance from microhigh to the center of an adjacent… … Glossary of landform and geologic terms
intermediate position — (gilgai) The subsurface location and morphology of the nearly level, transitional area (microslope) between an upwelling morphology (chimney) under a slightly elevated microhigh (i.e., microknoll; mound in Russia) and the bowl morphology… … Glossary of landform and geologic terms
micro-depression — (not preferred) refer to microlow … Glossary of landform and geologic terms
micro-low — See microlow … Glossary of landform and geologic terms
microrelief — a) [ soil survey ] Slight variations in the height of a land surface that are too small or intricate to delineate on a topographic or soils map at commonly used map scales (e.g., 1:24,000 through 1:10,000). Examples include microhigh,… … Glossary of landform and geologic terms
microslope — A generic microrelief term applied to areas of nominal surface relief (slightly sloping to level), relative to the adjacent ground surface; differences in overall local relief range from several centimeters to several meters. Cross sectional… … Glossary of landform and geologic terms
