Gloucestershire Geology Trust
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Hampen Formation

Middle Jurassic (Bathonian)

PERIOD
GROUP
FORMATION
Jurassic
Great Oolite
Hampen

Lithology
Limestones with subordinate interbedded marls; limestones characteristically grey to brown, thinly bedded, fine- to very fine-grained, well-sorted, ooidal grainstone to packstone, commonly slightly sandy or silty, with small-scale cross-bedding.

Upper Boundary
More or less sharp boundary with purer, off-white or yellowish peloidal packstone, wackestone or grainstone of the White Limestone Formation. .

Lower Boundary
Limestone and marl (as in Lithological Description), resting sharply on cross-bedded coarse-grained ooidal grainstone of the Taynton Limestone Formation or on mudstone/sandy limestone of the Fuller's Earth Formation.

Representative Sites
Daglingworth Quarry
Farmington Quarry

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

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