Earth science
Articles about geology, climate, oceans and the planet.
Troposphere
Troposphere: Earth's Lowest Atmospheric Layer — Structure, Composition, and Role
Trough (geology)
Trough (geology): definition, formation, types, and significance
Trough (meteorology)
Tseax River Cone
Tseax River Cone (Aiyansh Volcano)
Tsunami
Tsunami: causes, behavior, impacts and preparedness
Tufa
Tuff
Tuff: consolidated volcanic ash — formation, varieties, and uses
Tungurahua
Tungurahua — an active Ecuadorian stratovolcano
Unconformity
Unconformity (geology): definition, types, and significance
Underwater
Underwater: the environment beneath a water surface
Uniformitarianism
United States Geological Survey
United States Geological Survey (USGS)
Upper Cretaceous
Upper Cretaceous: Geological Epoch of Chalk Seas, Dinosaur Faunas, and the K–Pg Extinction
Upper Jurassic
Upper Jurassic (Late Jurassic Epoch)
Upper Triassic
Upper Triassic (Late Triassic epoch)
Ur (supercontinent)
Uranium mining
Uranium-lead dating
Vaalbara
Vaalbara: Earth's earliest proposed supercontinent
Variscan orogeny
Variscan (Hercynian) orogeny: late Palaeozoic mountain building and its remnants
Vermiculite
Villarrica (volcano)
Volcanic belt
Volcanic eruption
Volcanic eruption: causes, types, hazards and global significance
Volcanic Explosivity Index
Volcanic plug
Volcanic winter
Volcanism
Volcano
Volcano: formation, structure, eruption types, hazards and examples
Volcanoes in Iceland
Volcanoes of Kamchatka
Volcanology
Vredefort crater
Vredefort crater (Vredefort Dome) — Earth's largest confirmed impact structure
Water
Water: properties, states, cycle, and role in Earth's systems
Water content
Water content (soil moisture and pore water)
Water cycle
Water cycle (hydrological cycle)
Water on Mars
Water on Mars: distribution, evidence, and significance
Water table
Water table: definition, behavior, and significance in groundwater systems
Waterspout
Weather
Weather: Causes, Elements, Measurement, Forecasting and Impacts
Weather balloon
Weather balloon (sounding balloon)
Weather forecast
Weather forecast: how forecasts are made, used, and interpreted
Weather station
Weather station: instruments, history, and practical uses
Weathering
Wells Gray-Clearwater Volcanic Field
Wells Gray–Clearwater Volcanic Field — Quaternary Basaltic Volcanism in British Columbia
Western Interior Seaway
Wind
Wind: Causes, Types, Effects, Measurement and Planetary Variations