As it was going:
The resulting hole:
It was all in the name of science though..... ok.... it was 99% in the name of "splody fun" and 1% in the name of "checking to see how much the server can handle"...
But, we turned it into a science experiment, and that's the main (justifying) thing.
We found out that while the canyon was in it's "raw" form..... the server had MASSIVE issues with it. When we smoothed out the bedrock layer so it was flat instead of jagged (so by being flat had less surface area), the server then was *MUCH* happier.