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If you are referring to the actual Manhattan Schist type of rock, then yes that can have an effect on the cost of tunneling, but that wasn't really what your or
by vidanay 6y ago
If you are referring to the actual Manhattan Schist type of rock, then yes that can have an effect on the cost of tunneling, but that wasn't really what your original post said - you just said "all the bedrock".
Switzerland recently completed the Gotthard Base tunnel which is almost all hard rock mining.
- fastball 6y agoI'm no geologist, but I was under the impression that "bedrock" generally refers to this harder type of rock. It is not just a word for any rock that things are built on. Maybe I'm wrong though. I've never heard London referred to as being built on top of bedrock in the same way I've heard it of NYC.
- vidanay 6y agoBedrock is a generic term for the hard(er) layer of rock underneath the softer stuff. Manhattan has very tough bedrock (schist) London has very soft bedrock (chalk and London Clay) - and it's also deeper