| Rain |
form of precipitation consisting of falling water drops |
| Rapids |
an extremely fast-moving part of a river, caused by a steep descent in the riverbed |
| Regional Geography |
the branch of geography concerned with how the Earths surface is differentiated into unique places |
| Regolith |
rock derived by weathering of bedrock |
| Reverse Fault |
a fault in which the motion of the plates is towards each other, and one of the plates rides up over the other |
| Ria Coast |
deeply embayed coast formed by partial submergence of a landmass |
| Rift Valley |
trench like valley with steep, parallel sides |
| Rock |
natural collection of minerals in the solid state; usually hard and consisting of one, two, or more mineral varieties |
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