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geology
Plate Tectonics Theory: How Moving Plates Shape the Earth
Plate tectonics is the theory that Earth's outer shell is divided into rigid plates that move on a slowly flowing layer of rock...
Permafrost Melting: How Thawing Ground Fuels Climate Change
Permafrost thaw is the warming and decomposition of ground frozen for at least two years, releasing stored carbon as the ice binding soil,...
Quaternary Ice Age: Why Earth Is Still in an Ice Age
The Quaternary Ice Age is the current geological interval of repeated glacial and interglacial cycles, beginning 2.58 million years ago.
Unconformity: Where Billions of Years Vanish from Stone
An unconformity is a surface in the rock record where a gap in geological time separates two layers of stone, spanning millions to...
Magnetic Field Reversals: When Earth's Poles Swap
A magnetic field reversal is a change in polarity where Earth's magnetic north and south poles swap positions, recorded in rocks across hundreds...
Paleomagnetic Dating Methods: How Rocks Record Earth's Magnetic History
Paleomagnetic dating determines the age of rocks and sediments by measuring the magnetic signatures they acquired when they formed, matching polarity patterns to...
Uranium Decay Series: The 14 Steps from Uranium to Lead
The uranium decay series is the chain of 14 radioactive transformations through which uranium-238 converts into stable lead-206.
Geothermal Energy Production: How Earth's Heat Becomes Power
Geothermal energy production extracts heat from Earth's interior to generate electricity or supply direct heating, using three plant types and emerging enhanced systems.
Isotope Geochemistry: How Atomic Fingerprints Decode Earth's History
Isotope geochemistry reads the ratios of atomic isotopes in rocks, water, and air to reconstruct Earth's history and trace environmental processes.
Fossilization Process: How Organisms Become Fossils
Fossilization is the set of physical and chemical processes preserving organisms in Earth's crust, typically within sedimentary rock.
