The biggest marine reptile on record is a 21m-long ichthyosaur, Shonisaurus sikanniensis, from Triassic Period rocks in British Columbia, Canada.

BBC: Arctic sea monster's giant bite

It has old crystalline rocks from several hundreds of millions of years ago up to more recent formations of rocks including one of the largest Alpine Triassic carbonate successions, which has rich fossil remains.

UNESCO: MEDIA SERVICES