Which consequence occurs when extensive tephra accumulation undergoes lithification?

💡 Explanation

Welded tuff forms because lithification, via compaction and cementation, transforms unconsolidated tephra into solid rock under high temperature, thereby creating a dense, welded deposit rather than fragmented sediments. This process consolidates ash particles rather than other volcanic structures.

• Which geological change results when acidic rainwater interacts with fractured limestone?
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• Which outcome results when a solidified lava flow encounters buried glacial ice?
• Which mechanism causes the meandering pattern observed in mature lowland streams?
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• Which process causes increased lahar hazard after tephra deposition?