Chalk Group Lithostratigraphy: Northern Ireland - Garron Chalk Member

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The Garron Chalk (stratotype: Garron Point [D 301 239]), 9.65 m thick at its type locality, comprises chalk with common inoceramid bivalve shell fragments and giant flints (locally up to 4.5 m long), some developed as rings, like those in the coeval Beeston Chalk of the East Anglian succession (Fletcher, 1977). Apart from the inoceramid bivalve shell fragments, the fauna from the Garron Chalk contains locally abundant bryozoans (Wilson & Manning, 1978).

Macrofossil Biozonation: B. mucronata Zone s.l.

Correlation: see Correlation with other UK Chalk Group successions


FLETCHER, T P. 1977. Lithostratigraphy of the Chalk (Ulster White Limestone Formation) in Northern Ireland. Report of the Institute of Geological Sciences, No. 77/24.

WILSON, H E & MANNING, P I. Geology of the Causeway Coast, Vol. 2. Memoir of the British Geological Survey of Northern Ireland.

See: Beeston Chalk