100 Mind-Blowing Pressures Facts

Earth has a squishy interior. Earth’s interior is not solid but rather has a semi-solid or ‘squishy’ consistency owing to high temperatures and pressures. This squishy consistency allows the mantle to flow and move over geological timescales, which is responsible for phenomena such as plate tectonics, volcanic activity and Earthquakes. One consequence of this squishy interior is a process known as post-glacial rebound. During the last ice age, large portions of Earth’s surface were covered by glaciers, causing the underlying mantle to deform and sink. As the glaciers melted and receded, the mantle slowly rebounded back to its original position over thousands of years, causing the land above it to rise. This process is still occurring today in places such as Canada, Scandinavia, and Greenland, where the land is still rebounding from the weight of the glaciers that once covered the region. Recent research has found that West Antarctica is rising faster than anywhere else in the world, thanks to data from ESA’s GOCE gravity mission. The study of post-glacial rebound provides important insights into the structure and behaviour of Earth’s interior, and how it responds to changes in the surface environment over long timescales.