The Thrust, the Reef and the Whale
How the valley was made draws eleven stages across 1.1 billion years, and admits in its own source that the older the stage, the more of it is illustration between control points. Three places in this basin where the evidence is at the surface — a fault, a reef and a whale — and where each can be seen on the ground.
Years before present, logarithmic. Two of these are separated by fifteen
million years and sit almost on top of each other at this scale. The third is so recent that on a
linear axis it would share a pixel with today.