Which process dominates the widening of limestone karst fissures?

💡 Explanation

Preferential dissolution enlarges karst fissures because slightly acidic water dissolves limestone along fractures faster than surrounding rock; therefore pathways expand rather than uniform erosion occuring because equilibrium thermodynamics would predict far greater dissolution from uniform contact.

• Which phenomenon causes explosive volcanic eruptions at subduction zone stratovolcanoes?
• Which influence dominates lava dome morphology on composite cones?
• Which landform develops because differential weathering acts after glacial cirque formation?
• Which outcome is most likely when glacial meltwater inflows into a pluvial lake?
• Which geomorphic outcome indicates speleothem deposition within underground karstic caves?
• Which ecosystem failure initiates in limestone caves during extended drought?