Singular mountains are often the result of [[volcanism|volcanic]] processes but, in some instances such as the [[Hawaii|Hawaiian Islands]], these processes can result in a chain of mountains that might be considered a mountain range.
Uplifted regions or volcanic caps can undergo erosion, resulting in a range of mountains. An example is the [[English Lake District]]. Mountain streams carry eroded debris downhill and deposit it in [[alluvial plain]]s or in [[River delta|deltas]]. This forms the classical geological chain of events, leading to one type of [[sedimentary rock]] formation: [[erosion]], [[Transportation (sediment)|transportation]], [[Deposition (sediment)|deposition]] and [[compaction]].