well-preserved

Most craters are eroded but this one was well-preserved, meaning the scientists could look further into the rock levels.

Discovered in 1895 by German explorer Hermann Eberhard, Mylodon cave contained exceptionally well-preserved remains including pieces of skin, fur and dung.

Four-year-old Lily found a well-preserved dinosaur footprint at The Bendricks three years ago and now Tegan has spotted some more just down the coast.

Excavated from a gravel pit near Abingdon-on-Thames, Oxfordshire, the fossil includes part of the pterosaur's wing bone, which was broken into three pieces but still well-preserved.

The King appeared amused by this, commenting: "How fantastic, they're remarkably well-preserved."