Further reading:
Charles Darwin’s 1831 geological fieldwork in Shropshire
https://www.emgs.org.uk/uploads/1/4/9/1/149143154/mg19_3_2018_160_worsley_charles_darwins_1831_geological_fieldwork_in_shropshire_1.pdf?fbclid=IwY2xjawUwg7VleHRuA2FlbQIxMABwZG9mBWJyaWQRMFl3R3phVGdxdGlWTG9HUEtzcnRjBmFwcF9pZBAyMjIwMzkxNzg4MjAwODkyAAEeHTo-kEyKtKAgbfaPgLHxZcR_kakdgniUcECHgFsvMXtiQhgaQ7Sg3YgldYg_aem_P4rW0QTLX8E09IMrTCQJAw