Earth science
Articles about geology, climate, oceans and the planet.
Lapis lazuli
Laurentia
Laurussia
Laurussia (Euramerica): the Old Red Sandstone continent
Lava
Lava: molten rock that erupts and flows on Earth's surface
Lava dome
Leeward slope
Length of day
Limestone
Limnology
Limonite
Lithosphere
Little Ice Age
Littoral zone
Littoral zone: shoreward habitats and ecological role
The littoral zone is the nearshore area of seas, lakes and rivers where land and water meet; it includes intertidal areas, supports diverse communities, and plays key ecological an
Live Earth
Live Earth: the 2007 global concert series for climate awareness
Lō'ihi Seamount
Long Valley Caldera
Longshore drift
Loop Current
Loop Current (Gulf of Mexico): overview, behavior and significance
Low pressure area
Lower Cretaceous
Lower Jurassic
Lower Triassic
Lower Triassic Epoch
Mackenzie Large Igneous Province
Mackenzie Large Igneous Province (MLIP)
Magma
Magma: molten rock beneath Earth's surface
Magnetic pole
Maipo (volcano)
Maipo (volcano) — Andean stratovolcano on the Argentina–Chile border
Manicouagan crater
Manicouagan impact structure (Manicouagan Reservoir)
Mantle
Mantle — Earth layer, ceremonial cloak, and mollusc organ
Marl
Marl: calcareous clay-rich sediment and its rock form marlstone
Massif
Massif: Geologic mountain block formed by crustal uplift
Mauna Kea
Mauna Kea — White Mountain of Hawaii
Mauna Loa
Mediterranean climate
Megathrust earthquake
Meiji Seamount
Meiji Seamount — a flat-topped volcano in the Hawaiian–Emperor chain
Mercalli intensity scale
Mercalli (Modified Mercalli) intensity scale
Mesocyclone
Mesocyclone — rotating updraft in convective storms
Mesoproterozoic
Mesoproterozoic (1.6–1.0 billion years ago)
Mesosphere
Mesosphere: Earth's middle atmospheric layer
Mesozoic
Mesozoic Era: Age of Dinosaurs and the Rise of Modern Vertebrates
Mesozoic marine revolution
Messel pit
Messel Pit: Eocene lagerstätte and fossil treasure of Hesse, Germany
Metamorphic rock
Metamorphic rock: formation, types, and uses
Metamorphism
Metamorphism (Geology): Processes, Types and Importance
Meteorology
Methane hydrate
Methane hydrate (methane clathrate)
A crystalline ice-like solid in which methane molecules are trapped within water cages, occurring in marine sediments and permafrost; significant for energy potential and climate i
Micropaleontology
Mid-Continent oil province
Mid‑Continent oil province