Yeah, I know ya gotta scroll...
I didn't fill in the bottom few inches with shells, fossils, and minerals
because one of our next projects is to re-pour the slab so water does not
gather on the flat,
but flows as it should down the gut (in the far left fore of this pic).
Below are close-up pics of the wall from left to right






and..

Whew!
Now that was FUN!
(though you still can't really see the detail or get the feel for what it looks like in person.)