Search for Scotland’s 1.2-billion-year-old meteorite impact crater

The Stac Fada Member is an intriguing layer of rock in the North West Highlands UNESCO Global Geopark in northern Scotland. This unusual rock layer lies within a sequence of ancient sandstone and mudstone, part of the Torridonian Sandstone that formed more than 1000 million years ago. The layer has been interpreted as a meteorite impact blanket, but the site of the crater is as yet uncertain. Two recent papers argue for two different locations – one sited to the east, near the town of Lairg and the other to the south-west, under what is now the Minch seaway. The controversy is outlined in this recent EOS article ….

The Search for the Impact That Cratered Ancient Scotland