Cockercombe Tuff is a greenish-grey, hard
pyroclastic
Pyroclastic rocks (derived from the el, πῦρ, links=no, meaning fire; and , meaning broken) are clastic rocks composed of rock fragments produced and ejected by explosive volcanic eruptions. The individual rock fragments are known as pyroc ...
rock, formed by the compression of
volcanic ash
Volcanic ash consists of fragments of rock, mineral crystals, and volcanic glass, created during volcano, volcanic eruptions and measuring less than 2 mm (0.079 inches) in diameter. The term volcanic ash is also often loosely used t ...
containing high quantities of
chlorite
The chlorite ion, or chlorine dioxide anion, is the halite with the chemical formula of . A chlorite (compound) is a compound that contains this group, with chlorine in the oxidation state of +3. Chlorites are also known as salts of chlorous ac ...
, which gives it its distinctive colour. It is found almost exclusively in the south-eastern end of the
Quantock Hills
The Quantock Hills west of Bridgwater in Somerset, England, consist of heathland, oak woodlands, ancient parklands and agricultural land. They were England's first Area of Outstanding Natural Beauty, designated in 1956.
Natural England have desi ...
near
Cockercombe,
Somerset
( en, All The People of Somerset)
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, coordinates =
, region = South West England
, established_date = Ancient
, established_by =
, preceded_by =
, origin =
, lord_lieutenant_office =Lord Lieutenant of Somerset
, lord_ ...
, England from where it has been quarried for centuries.
Quantock Lodge
Quantock Lodge is a grade II listed nineteenth-century Gothic revival mansion built by Henry Labouchere, 1st Baron Taunton (1798–1869), to the design of Henry Clutton. It is built from Cockercombe tuff and is located near Aley in the parish of ...
is built from Cockercombe tuff.
References
Volcanic rocks
Building stone
Geology of Somerset
Volcanism of England
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