Giants Causeway

At https://www.dailymail.co.uk/sciencetech/article-11283889/ … the Giants Causeway is the major tourist hot spot in Northern Ireland. It is an unusual formation of 40,000 hexagonal stone columns descending gently into the sea. How they were formed is unsettled geology, we are told. A new theory has been proposed by Dr Mike Simms, curator of natural science at the National Museum of Northern Ireland. His theory involves a formation of the geology in a matter of days, if not hours, rather than over thousands of years, the prevailing assumption. The formation stretches along the coast of Ulster for around 4 miles – and each column typically has five to seven sides. They came into being about 50 to 60m million years ago, during the Paleogene Period [the Pg in the K/Pg boundary asteroid strike]. Lava creeping towards the coast is thought to have cooled after making contact with the sea – but was the sea where it is now 60 million years ago?