Variscan Coast Dr Beth Simons's site, with lots of images, walks, and general information by a granite specialist.
Cornwall Geoconservation Group FB page - covering not only geoconservation but geological stories in Cornwall and also stories worldwide with relevance to Cornwall (e.g. the volcanic eruption in Iceland).
Geomincentre CSM's virtual museum. The site has lots of useful information but is old and will be replaced soon.
Royal Geological Society of Cornwall RGSC, founded in 1814, is the second oldest geological society in the world and is based in Penzance.
Royal Geological Society of Cornwall FB page.
Cornwall and West Devon Mining Landscape World Heritage Site 10 areas from west Cornwall to west Devon forming one World Heritage Site.
Cornwall & West Devon Mining Landscape Information on UNESCO website.
Cornwall CNL (Cornwall National Landscape) Ten areas in Cornwall form the Cornwall National Landscape. And there's also the Tamar Valley, shared with Devon (see below).
https://sites.google.com/view/cornwallgeoconservationgroup/links
Geomincentre CSM's virtual museum. The site has lots of useful information but is old and will be replaced soon. .....apologies, I had forgotten you cannot access this now without an Exeter account.
Cornwall Geologist Dr Sam Hughes's site for info, walks and talks, and consulting https://www.cornwallgeologist.co.uk/
Cornwall Geologist on Facebook https://www.facebook.com/cornwallgeologist
Tamar Valley CNL
Geoconservation UK The umbrella organisation for voluntary geoconservation in the UK: CGG has been an active member since the formation of this umbrella.
General:
MAGIC "Interactive mapping at your fingertips" - a government website showing SSSIs, SACs, National Parks, National Trails, and much more.
Natural England National nature conservation body.
Environment Agency National body for floods and coastal change (and more).