Editing Geomorphology (section)

=== Hillslope processes ===
[[File:TalusConesIsfjorden.jpg|thumb|[[Talus cone]]s on the north shore of [[Isfjorden (Svalbard)|Isfjorden]], [[Svalbard]], Norway. Talus cones are accumulations of coarse hillslope debris at the foot of the slopes producing the material.]]
[[Image:Ferguson-slide.jpg|thumb|The [[Ferguson landslide|Ferguson Slide]] is an active [[landslide]] in the [[Merced River|Merced River canyon]] on [[California State Highway 140]], a primary access road to [[Yosemite National Park]].]]
[[Soil]], [[regolith]], and [[rock (geology)|rock]] move downslope under the force of [[gravity]] via [[Downhill creep|creep]], [[Landslide|slides]], flows, topples, and falls. Such [[mass wasting]] occurs on both terrestrial and submarine slopes, and has been observed on [[Earth]], [[Mars]], [[Venus]], [[Titan (moon)|Titan]] and [[Iapetus (moon)|Iapetus]].

Ongoing hillslope processes can change the topology of the hillslope surface, which in turn can change the rates of those processes. Hillslopes that steepen up to certain critical thresholds are capable of shedding extremely large volumes of material very quickly, making hillslope processes an extremely important element of landscapes in tectonically active areas.<ref>{{cite journal |last1=Roering |first1=Joshua J. |last2=Kirchner |first2=James W. |last3=Dietrich |first3=William E. |title=Evidence for nonlinear, diffusive sediment transport on hillslopes and implications for landscape morphology |journal=[[Water Resources Research]] |date=March 1999 |volume=35 |issue=3 |pages=853–870 |doi=10.1029/1998WR900090 |bibcode=1999WRR....35..853R |doi-access=free }}</ref>

On the Earth, biological processes such as [[burrowing]] or [[tree throw]] may play important roles in setting the rates of some hillslope processes.<ref>{{cite journal |last1=Gabet |first1=Emmanuel J. |last2=Reichman |first2=O.J. |last3=Seabloom |first3=Eric W. |title=The Effects of Bioturbation on Soil Processes and Sediment Transport |journal=[[Annual Review of Earth and Planetary Sciences]] |date=May 2003 |volume=31 |issue=1 |pages=249–273 |doi=10.1146/annurev.earth.31.100901.141314 |bibcode= 2003AREPS..31..249G}}</ref>