The two block diagrams below represent the formation of caves. Cave
Acid rain
Key
w Igneous rock
Early stage
Later stage
Which types of weathering and erosion are primarily responsible for the formation of caves?
A
chemical weathering and groundwater flow
B
chemical weathering and runoff
С
physical weathering and groundwater flow
D
physical weathering and runoff

1. seamount a raised footwall block between normal fault creates this 2. syncline break between rocks where a hanging wall rises relative to a footwall 3. hot spring on rolling hills, this a dip between hills 4. volcanic neck created when a block with hanging walls slips down between normal faults 5. caldera underwater volcano that never reaches above sea level 6. horst natural hot water on earth's surface containing many minerals 7. graben underwater volcano whose top is eroded flat by waves 8. crater less than a mile in diameter; looks like a bowl at the top of a volcano 9. guyot magma that filled the central vent that remains after the volcano has eroded 10. reverse fault over 1 mile in diameter; looks like a bowl over a volcano