A horizontal flow of basalt exhibits almost perfect columnar jointing. How might

Question

A horizontal flow of basalt exhibits almost perfect columnar jointing. How might this affect the suitability of this rock unit as the portal for a highway tunnel? How would the columnar jointing affect the use of volcanic unit as a pressure tunnel leading water to an underground power house? A basaltic formation has been selected as the quarry for production of concrete aggregate, embankment material, and riprap for a large rock-fill dam. What are the potential problems in attempting to operate this quarry successfully?

Explanation / Answer

11.columnar jointing rock units more dangerous for highway tunnels, because rocks are slide down on the highways.differential volume changes in columnar joints.

columnar joints forms due to stress,lava flow.

12.There are number of problems placed ,environment issues,groundwater polution.

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