360 million years ago, the little bit that would eventually become Britain sat in the equatorial region. It was covered by warm, shallow waters and it was then that sediments were laid down that, millions of years later, would become the limestone of Yorkshire and millstone grit of the Pennines.
Over the next sixty million years (give or take) it became swampy and covered by vast tracts of tropical rainforest. What, can’t imagine that? Here, have a picture, it’ll help, but remember;
no dinosaurs!