What type of landform is typically formed in limestone?

Limestone is a sedimentary rock that is primarily composed of calcium carbonate, which is highly susceptible to erosion, particularly through a process known as chemical weathering. When rainwater, which is slightly acidic due to dissolved carbon dioxide, seeps through cracks in the limestone, it slowly dissolves the rock, leading to the formation of various karst landscapes, which include arches.

Arches are significant landforms that can develop in limestone areas, formed when certain parts of rock remain intact while the surrounding material is eroded away. This process can create striking formations that are often grand in scale and aesthetically unique.

In contrast, while limestone can be found in mountainous regions, it is not specifically a product of mountain formation. Valleys may also occur in limestone terrain but are not a direct result of limestone's characteristics. Prairies represent a type of grassland ecosystem and do not specifically relate to the formation processes of limestone. Understanding the geological processes that affect limestone helps clarify why arches are specifically associated with limestone landscapes.