Paleoaltimetry is the study of past elevations of Earth's surface. This field of research uses various geological and geomorphological techniques to reconstruct the ancient topography of a region. By analyzing features such as fossilized marine organisms, isotopic compositions of minerals, and sedimentary deposits, researchers can estimate the elevation of a particular area during a specific time period in the past. Paleoaltimetry provides valuable information about the tectonic history, climate change, and evolution of landscapes on Earth.