Mines with Coal Formation and Rank

14 linked mines · Geology: Coal Formation and Rank

Listed only where MineArchive's own research gives a reasonable evidential basis for the connection — not every mine where this geology might plausibly apply.

Mine	Region	Worked	Commodities	Connection
Abercwmboi Colliery	Rhondda Cynon Taf	1851 (working by 1828 on one account)–1962	Coal	(historical documentary reference) Type 201B dry steam coal, non-caking and low in volatiles, sold for ships, locomotives and power stations.
Betws Colliery	Carmarthenshire	From 1974–June 2003	Coal	(historical documentary reference) Worked the low-volatile anthracite of the Amman Valley.
Cefn Coed Colliery	Neath Port Talbot	1921 (sinking)–20 April 1968	Coal	(well documented example) Worked anthracite, coal carried further through coalification than the steam and house coals to the east.
Fochriw Colliery	Caerphilly	1823 (drift)–1924	Coal	(historical documentary reference) Produced a low-volatile coking steam coal.
Glyncorrwg Colliery	Neath Port Talbot	1904–1970	Coal	(well documented example) The coal here reaches semi-anthracite and dry steam rank.
Gwendraeth Colliery	Carmarthenshire	By 1852, possibly earlier–1870s	Coal	(historical documentary reference) Worked anthracite where the coal has been carried to the highest rank found in Britain.
Haig Colliery	Cumbria	1914-18 (sinking)–1986	Coal	(historical documentary reference) Produced high-volatile, strongly caking coal for iron making, gas and domestic fires.
Kilgetty Colliery	Pembrokeshire	c. 1843–1939	Anthracite	(well documented example) Pembrokeshire anthracite, the hardest and most carbon-rich rank, hard to light and slow-burning.
Lady Windsor Colliery	Rhondda Cynon Taf	1884–85 (first coal 1886)–February 1988	Coal	(historical documentary reference) Worked the high-rank steam coals of the Four Feet, Six Feet and Nine Feet seams.
Nixon's Navigation Colliery	Rhondda Cynon Taf	1860–1940	Coal	(historical documentary reference) The coal was classed as dry steam coal, low in volatiles and usually non-caking.
Peckfield Colliery	West Yorkshire	1874–1980	Coal	(historical documentary reference) Westphalian Coal Measures yielding high-volatile bituminous coal.
Seven Sisters Colliery	Neath Port Talbot	1872–1963	Coal	(well documented example) The Nine Feet seam here is an anthracite, not the steam coal the same seam gives further east.
Tan Hill Colliery	North Yorkshire	By the 13th century (first dated record 1384)–1935 or 1938 (sources differ)	Coal	(historical documentary reference) A compact, bright coal of fairly high rank that coked strongly.
Woodhouse Colliery	Cumbria	2025–31 March 2025	Coal	(historical documentary reference) Designed to extract high-volatile hard coking coal for steelmaking.

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