Geology
Haytor has the form of a typical "avenue" tor, where the granite between the two main outcrops has been eroded away. Its characteristic shape is a notable landmark visible on the skyline from many places in south Devon between Exeter and Totnes. The majority of the tor consists of coarse-grained granite, but at the base of the western outcrop is a layer of finer-grained granite which has eroded more than the rock above, leaving a pronounced overhang, or "rock-shelter" of two or three feet in places.
Haytorite, a variety of quartz found in an iron mine adjacent to the Hay Tor granite quarries, was named “in honour of its birth-place”.
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