The Appalachian Mountains were formed millions of years ago as a result of the collision of two tectonic plates. Over time, the mountains have been eroded by various processes, including weathering, erosion, and glaciation. These processes have acted on the mountains over long periods of time, and the resulting landforms provide evidence of the gradual and continuous changes that have occurred.
The erosion of the Appalachian Mountains is an example of a uniformitarian process, because it is a process that is still happening today and has been happening for millions of years. The evidence of this process can be seen in the present-day landscape of the Appalachian Mountains, where there are valleys, rivers, and other landforms that have been formed by erosion over time. This evidence supports the principle of uniformitarianism by demonstrating that the same processes that are shaping the Earth's surface today have been operating for millions of years and will continue to do so in the future.
