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Faughan and Dungiven Basins - BanagherLondonderry
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Summary Full report
Site Type: Inland exposure
Site Status:
Grid Reference: X26784069, X26684068
Rock Age: Quaternary
Rock Type: Gravel, Sand
Other interest: No data, Glacio-fluvial sediment, deltaic foresets

Summary of site:

On either side of the Owenrigh River where it emerges from its confined valley below Mount Prospect, there is a substantial sediment body almost 60m thick. The sands and sandy gravel beds have internal inclines (foresets) of around 18, sloping to the north east. They were originally a single mass, now divided into two fragments by a meltwater channel and the modern river. A ridge 500m long extends north-west/south-east from Banagher Church into these deposits.

When the last ice sheets were retreating, ice tunnels fed sediments in torrents of fast-flowing meltwater into a lake here, confined behind an ice dam. The lake surface was about 122m above modern sea level.

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