Non-movable plates are geological structures that do not shift or change position over time. These plates are typically found in stable regions of the Earth's crust, where tectonic activity is minimal. They contrast with tectonic plates, which are constantly moving due to the flow of molten rock beneath them. These plates can be important for understanding the Earth's geology and can influence local landforms and ecosystems. Non-movable plates often serve as a foundation for various natural features, such as mountains and valleys, and can affect the distribution of resources like minerals and fossil fuels.