Igneous rocks that undergo weathering and erosion don't magically transform into something else. Instead, they break down into smaller pieces. Here's the breakdown:

* Weathering: This is the process of breaking down rocks into smaller pieces. It can be caused by:

* Physical weathering: Things like freezing/thawing, wind abrasion, or plant roots breaking the rock apart.

* Chemical weathering: Reactions with water, acids, or oxygen that change the rock's composition.

* Erosion: This is the process of transporting those weathered rock fragments away from their original location. Wind, water, and ice are the main agents of erosion.

So, igneous rocks (like granite, basalt, or obsidian) are not transformed into a new type of rock by weathering and erosion. Instead, they are:

* Broken down into smaller pieces: Think sand, pebbles, gravel, or even dust.

* Transported: These fragments are carried away by wind, water, or ice.

These eroded fragments can then be deposited in new locations and eventually become sedimentary rocks under pressure and over time. However, this is a separate process from weathering and erosion.