I accidentally had a career of working on old buildings, 30 or more churches, an historic royal palace, scheduled ancient monuments, 2 castles and a Roman city in Turkey .
Worked on many smaller houses, cottages and walls etc. too.
Made a vid of some of the work on Dunster Castle in Somerset...
I wrote a bit on Lime mortar a while back too, it's still on my website
Access Google Sites with a personal Google account or Google Workspace account (for business use).
sites.google.com
Going back to the Dinatrons and the Chalk, a bit further down the coast there is an outcrop of the top layer of the chalk. This is topped by an inch layer of mud...
The mud is made up of debris that fell back to Earth after the meteor hit. Bits of vapourised rock, soot from the global forest fires and Irridium, from where the meteor pierced the Earth's crust. This mud is found worldwide at the end of the Cretaceous period. Before it there are Dinosaur fossils, after it there aren't