What is the life expectancy of a rock?

Answer 1

The life expectancy of a rock is not easily defined, as it can vary greatly depending on factors like its type, environmental conditions, and geological processes. Rocks can last millions to billions of years, surviving through erosion, weathering, and tectonic activity. Some rocks may eventually break down into sediment, while others may transform into different rock types through metamorphism. In essence, rocks can persist for an incredibly long time, far exceeding human timescales.