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image: South wall of Long Gilbert Quarry, Ballymagarry, showing Long Gilbert Flint Band (one third up from quarry floor) at base of Tanderagee Chalk, with massive flints of Ballymagarry Chalk prominent beneath; overhang marks base of Port Calliagh Chalk.
South wall of Long Gilbert Quarry, Ballymagarry, showing Long Gilbert Flint Band (one third up from quarry floor) at base of Tanderagee Chalk, with massive flints of Ballymagarry Chalk prominent beneath; overhang marks base of Port Calliagh Chalk.
 
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