Rock climbing is vertical or horizontal motion over steep rocky terrain.
The rock that climbers climb on is generally varied. In Britain the following types are common:
- gritstone (a course sandstone) in the Peak District and Yorkshire.
- limestone in Wales, Peak District, Yorkshire, Scotland.
- sandstone (that is, usually softer and/or finer than gritstone) in Northern England, Southern England, Northern Scotland.
- granite in West Penwith.
- slate in North Wales (and parts of Devon and Cornwall?).
- gabbro on The Isle of Skye.
- rheolite, other. Elsewhere.
In terms of climbing the factors that vary across different types of rock are the friction on the rock, the strength of the grips, the looseness of rocks, the amount of vegetation on the rock and the typical frequency of protection placements.
For example, Peak District gritstone has high friction and is generally strong and compact and vegetation free, but it is known for producing routes with very sparse protection.
Which rock is best to climb on is a discussion likely to cause great debate amongst some climbers.
Climbers grade the routes they climb. The grading system used varies from country to country (and region) and according to what style the climb is.
See also: Climbing area.