Geology Articles

• Caving
  Acid Rain
  Geography
  Geology
  Oceanography
  Water
   
  

  Limestone

  Limestone is a sedimentary rock composed largely of the mineral calcite (calcium carbonate: CaCO3). Limestones often contain variable amounts of silica in the form of chert or flint, as well as ... > more
• Earthquakes
  Natural Disasters
  Tsunamis
  Early Climate
  Earth Science
  Geology
   
  

  Earthquake

  An earthquake is the result of a sudden release of stored energy in the Earth's crust that creates seismic waves. Earthquakes are accordingly measured with a seismometer, commonly known as a ... > more
• Mining
  Geology
  Earth Science
  Geochemistry
  Oceanography
  Earthquakes
   
  

  Quartz

  Quartz is one of the most common minerals in the Earth's continental crust. It belongs to the hexagonal crystal system, and is made up of silica (SiO2) tetrahedra. Quartz has a hardness of 7 on the ... > more
• Oceanography
  Water
  Floods
  Geography
  Global Warming
  Desert
   
  

  Sediment

  Sediment is any particulate matter that can be transported by fluid flow and which eventually is deposited as a layer of solid particles on the bed or bottom of a body of water or other liquid. ... > more
• Near-Earth Object Impacts
  Earth Science
  Geography
  Natural Disasters
  Geology
  Earthquakes
   
  

  Chicxulub Crater

  Chicxulub Crater is an ancient impact crater buried underneath the Yucatan peninsula, with its center located approximately underneath the town of Chicxulub, Yucatan, Mexico. Investigations suggest ... > more
• Earthquakes
  Natural Disasters
  Landslides
  Tsunamis
  Desert
  Early Climate
   
  

  Earthquake liquefaction

  Earthquake liquefaction, often referred to simply as liquefaction, is the process by which saturated, unconsolidated soil or sand is converted into a suspension during an earthquake. The effect on ... > more
• Earthquakes
  Geology
  Earth Science
  Landslides
  Environmental Science
  Natural Disasters
   
  

  Geotechnical engineering

  Geotechnical engineering is concerned with the engineering properties of earth materials. Geotechnical engineers investigate the soil and bedrock below a site to confirm their engineering properties ... > more
• Volcanoes
  Natural Disasters
  Earthquakes
  Geography
  Near-Earth Object Impacts
  Tsunamis
   
  

  Caldera

  A caldera is a volcanic feature formed by the collapse of a volcano into itself, making it a large, special form of volcanic crater. A caldera collapse is usually triggered by the emptying of the ... > more
• Volcanoes
  Natural Disasters
  Earthquakes
  Geography
  Geology
  Tsunamis
   
  

  Stratovolcano

  A stratovolcano is a tall, conical volcano composed of one layer of hardened lava, tephra, and volcanic ash. These volcanoes are characterized by a steep profile and periodic, explosive eruptions. ... > more
• Climate
  Weather
  Atmosphere
  Geography
  Severe Weather
  Global Warming
   
  

  Atmospheric circulation

  Atmospheric circulation is the large-scale movement of air by which heat is distributed on the surface of the Earth. The wind belts and the jet streams girdling the planet are steered by three ... > more

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