The plastic flow of rock reminds me of a related question: How high can a cliff
face be before the weight of the rock above causes the face to blow out. For
hard rock (granite, sandstone, maybe limestone) it is obviously pretty high,
like on the order of several thousand feet based on El Capitan
For a post that was about neither caves nor karst, someone seems to have been
reading it. I received several thoughtful questions. Additionally, you have
reminded me that the answers show that this is related to karst after all,
justifying my posting on this forum. Thank you.
The miners and
