Geology Articles

• Earthquakes
  Geology
  Natural Disasters
  Tsunamis
  Geography
  Earth Science
   
  

  Plate tectonics

  Plate tectonics is a theory of geology developed to explain the phenomenon of continental drift and is currently the theory accepted by the vast majority of scientists working in this area. In the ... > more
• Geology
  Fossils
  Earth Science
  Origin of Life
  Earthquakes
  Early Climate
   
  

  Precambrian

  The Precambrian is an informal name for the eons of the geologic timescale that came before the current Phanerozoic eon. It spans from the formation of Earth around 4500 Ma (million years ago) to the ... > more
• Volcanoes
  Geology
  Natural Disasters
  Geography
  Caving
  Oceanography
   
  

  Basalt

  Basalt is a common gray to black volcanic rock. It is usually fine-grained due to rapid cooling of lava on the Earth's surface. It may be porphyritic containing larger crystals in a fine matrix, or ... > more
• Volcanoes
  Natural Disasters
  Sports Science
  Geology
  Nature of Water
  Biochemistry
   
  

  Volcanic rock

  Volcanic rock is an igneous rock of volcanic origin. Volcanic rocks are usually fine-grained or aphanitic to glassy in texture. They often contain clasts of other rocks and phenocrysts. Phenocrysts ... > more
• Earthquakes
  Geology
  Natural Disasters
  Geography
  Earth Science
  Tsunamis
   
  

  Geology of the Himalaya

  The Geology of the Himalaya is a record of the most dramatic and visible creations of modern plate tectonic forces. The Himalayas, which stretch over 2400 km are the result of an ongoing orogeny, the ... > more
• Fossils
  Geology
  Origin of Life
  Extinction
  Geography
  Environmental Policy
   

  Paleozoic

  The Paleozoic Era is a major division of the geologic timescale, one of four geologic eras. The Paleozoic includes six geologic periods; from oldest to youngest -- the Cambrian, Ordovician, Silurian, ... > more
• Soil Types
  Organic
  Fungus
  Landslides
  Agriculture and Food
  Acid Rain
   
  

  Soil science

  Soil science deals with soil as a natural resource on the surface of the earth including soil formation, classification and mapping; physical, chemical, biological, and fertility properties of soils ... > more
• Geography
  Geology
  Earthquakes
  Natural Disasters
  Earth Science
  Hurricanes and Cyclones
   
  

  Orogeny

  Orogeny is the process of mountain building, and may be studied as a tectonic structural event, as a geographical event and a chronological event, in that orogenic events cause distinctive structural ... > more
• Water
  Recycling and Waste
  Drought
  Environmental Issues
  Drought Research
  Ecosystems
   
  

  Groundwater

  Groundwater is water located beneath the ground surface in soil pore spaces and in the fractures of geologic formations. A formation of rock/soil is called an aquifer when it can yield a useable ... > more
• Geology
  Nature of Water
  Energy and Resources
  Sports Science
  Atmosphere
  Floods
   
  

  Sedimentary rock

  Sedimentary rock is one of the three main rock groups (along with igneous and metamorphic rocks) and is formed in four main ways: by the deposition of the weathered remains of other rocks (known as ... > more

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