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Tintern Sandstone

Late Devonian (Fammenian)

PERIOD	GROUP	FORMATION
Devonian	Old Red Sandstone	Tintern Sandstone

Lithology
Interbedded grey-green, puplish brown and red sandstones with subordinate quartz pebble conglomerate, mudstone and marl partings.

Upper Boundary
Upward passage of alternating sandstone shale and limestone grade into the Lower Limestone Shale.

Lower Boundary
Drawn at base of Tintern Sandstone Group where it rests conformably on quartz conglomerate of the Quartz Conglomerate Group.

Representative Sites
Lea Bailey Track Cutting
Tintern Parva Quarry

Information on lithology and boundaries taken from the British Geological Survey Lexicon of Named Rock Units
and BGS Memoirs.