Uplift and erosion do not directly form a batholith. Instead, they reveal a batholith that already exists. Here's how:

* Batholiths are formed deep underground: Batholiths are large, intrusive igneous bodies formed when magma cools and solidifies deep within the Earth's crust. They are typically associated with mountain building (orogeny).

* Uplift exposes the batholith: Over millions of years, tectonic forces can cause uplift in the surrounding rock, raising the batholith closer to the surface.

* Erosion removes overlying rock: Erosion, caused by wind, water, and ice, gradually wears away the overlying rock that once covered the batholith.

So, uplift and erosion work together to exhume the batholith, bringing it to the surface where we can observe it.

Here's a simple analogy: Imagine a giant cake buried underground. The "uplift" would be like someone slowly pulling the cake upwards, and the "erosion" would be like someone carefully scraping away the dirt and frosting on top, eventually revealing the cake's full shape.