downcutting

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downcutting

[′dau̇n‚kəd·iŋ]
(geology)
Stream erosion in which the cutting is directed in a downward direction.
References in periodicals archive ?
A: A compression spiral Is a spiral with an upcut on the bottom and a downcut on the top.
However, no visitor to the African Rift can fail to be impressed by the extraordinary range and diversity of tectonic features and resulting complexity of land forms: rift scarps, downcut gorges, volcanic cones, lava fields, back-tilting along fault boundaries and rift scarps with basins that trap sediment and water, large fault-bounded lake basins on the rift floor, smaller volcanic crater lakes, and a complex staircase-effect of faulting, rift scarps, volcanic features and localised basins rising on either side of the main rift axis.
LMT Onsrud offers the Marathon Downcut Spiral to complement its Marathon Compression offering.
These definitions and kinematics are valid for uncut as well as downcut conditions.
The stream was a downcut channel and rabbit brush, an invasive plant not grazed by livestock, was predominant in the pasture.
The channel was severely downcut, and groundwater levels had sunk below the rooting zone of shrub stands that are a crucial component of the mouse habitat.
On Figure 1 the section is exposed about two miles north of Warrensburg where Post Oak Creek has downcut through the Warrensburg Sandstone.
Eyewitnesses reported that collapse of the seepage pipe created a breach in the dam that rapidly downcut.
After two winters, Canon Creek has downcut approximately 3 feet (1 m) and has a deeper, more defined channel.
Most rockhouses occur south of the Wisconsinan Glacial Boundary, in stream valleys downcut during the Pleistocene, especially during Illinoian and Wisconsinan Stages.
0001" of material is removed on the wheel diameter during truing, which is done with a rotary diamond tool operating in the downcut mode.
CNC Cutting Tools is pleased to introduce their New Nonferrous Upcut and Nonferrous Downcut Tooling Kits specifically designed for cutting softer alloy metals such as aluminum, brass, and copper.