Which of the following pairs is correctly matched with reference to limestone cave formations?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. Pillar - Formed by union of stalactite and stalagmite.
In limestone (karst) topography, caves are formed by the chemical weathering of calcium carbonate. As mineral-rich water drips from the ceiling, it leaves behind deposits. Stalactites grow downwards from the roof, while Stalagmites grow upwards from the floor where the water lands. Over thousands of years, these two formations may eventually meet and fuse together. This continuous vertical structure connecting the cave floor to the ceiling is known as a Pillar or a column.