What would happen to new land formed by a volcanic eruption or melting glacier?

New land formed by a volcanic eruption or melting glacier would initially be barren and devoid of life. Over time, volcanic soils can become fertile, supporting plant growth, while glacial deposits may create a mix of sediment that can be colonized by pioneer species. This process of ecological succession would gradually lead to the development of a more diverse ecosystem. Eventually, the area could evolve into a stable habitat, supporting various forms of wildlife.