How is limestone physically weathered?

Answer 1

Here are some examples:

1. Water flowing over it, like the Grand Canyon.

2. Mechanical wearing, like from being walked on, ever seen steps with imprints?

3. Ice damage, water seeps into cracks and when cooled forms ice which expands and cracks the stone, like potholes forming.

Answer 2

Limestone can be physically weathered through processes like freeze-thaw weathering, where water enters cracks in the rock, freezes and expands, causing the rock to break apart. Another process is abrasion, where wind or water carries sand and pebbles that wear down the limestone over time. Additionally, plant roots can grow into cracks in limestone, widening them as they grow.