Paleogeography is the scientific study and reconstruction of past geographic configurations of Earth’s surface, including the distribution of continents, oceans, mountain ranges, basins, and depositional environments through geologic time. It integrates data from plate tectonics, stratigraphy, paleomagnetism, sedimentology, paleontology, and geochronology to infer past positions and movements of tectonic plates and associated paleoenvironments. Paleogeographic reconstructions provide essential boundary conditions for paleoclimate modeling, basin analysis, sediment routing systems, and biogeographic studies, enabling quantitative assessment of how changes in Earth’s surface configuration have influenced climate systems, ocean circulation, biodiversity patterns, and the formation and distribution of natural resources.
The surface of Mars is known for being an extremely cold, desiccated, and irradiated place. But as its many surface features attest, the red planet was once a warmer, wetter place with flowing water and glaciers. Today, most ...
Planetary Sciences
Mar 29, 2025
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In the 1970s, images from the NASA Mariner 9 orbiter revealed water-sculpted surfaces on Mars. This settled the once-controversial question of whether water ever rippled over the red planet.
Planetary Sciences
Feb 25, 2025
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A Chinese rover that landed on Mars in 2021 detected evidence of underground beach deposits in an area thought to have once been the site of an ancient sea, providing further evidence that the planet long ago had a large ...
Astrobiology
Feb 24, 2025
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126
Thousands of mounds and hills in Mars' barren northern plains are full of clay minerals, providing evidence that the rocks here were once soaked with water, a new study reveals. These mounds are all that is left of a landscape, ...
Planetary Sciences
Jan 20, 2025
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