BGS maps portal — maps and sections 1832 to 2014

"The British Geological Survey is a world-leading geological survey. It focuses on public-good science for government, and research to understand earth and environmental processes.This resource provides high resolution scans of almost all small and medium scale maps produced by the British Geological Survey since mapping started in 1832. It includes the key 1:63 360/1:50 000 maps of England and Wales and of Scotland. For users who just want to consult the latest editions of the 1:63 360/1:50 000 maps 'Quick links' have been provided below."