A resurgent stream is not exclusively formed in limestone areas. While limestone areas are more likely to have resurgent streams, they can also form in other geological settings.

Here's why:

* Limestone's solubility: Limestone is composed of calcium carbonate, which is soluble in slightly acidic water. When rainwater flows over limestone, it dissolves the rock, creating underground cavities and sinkholes. This process, known as karst topography, leads to the development of underground drainage systems.

* Resurgence: Resurgent streams are formed when underground water flows through these karst systems and emerges back at the surface. The water typically exits at a lower elevation than where it entered the ground, forming a stream.

* Other formations: Resurgent streams can also occur in other geological formations, such as:

* Volcanic areas: Where groundwater flows through lava flows or volcanic ash, it can emerge at the surface as a resurgent stream.

* Areas with extensive fractured bedrock: Water can percolate through fractures in rocks and resurface as a stream.

* Areas with glacial deposits: Melting glacial ice can create underground channels that lead to resurgent streams.

In summary: While limestone areas are prone to the development of karst topography and subsequent resurgent streams, these streams can occur in other geological settings where underground water flows and resurfaces.