Which consequence most directly results from differential erosion around coastal sea stacks?

💡 Explanation

Coastal caves and arches form near stacks because wave action preferentially erodes weaker rock layers via hydraulic action. Therefore caves can grow on weaker layers, rather than uniform erosion of the stack's base producing simple undercutting.

• Which mechanism causes the formation of terraced alluvial fans in arid environments after prolonged tectonic uplift?
• Which outcome develops when wave action erodes headlands?
• Which risk markedly increases within deep karst caves upon prolonged, widespread surface pavement?
• Which mechanism causes the formation of horst and graben structures within a continental rift zone?
• When a volcanic eruption deposits a thick tephra layer on unstable slopes, which mass wasting mechanism amplifies debris flow hazards?
• Which process primarily causes cyclical avulsions of a river across its alluvial fan?