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  2. Biogeochemical cycle - Wikipedia

    en.wikipedia.org/wiki/Biogeochemical_cycle

    A biogeochemical cycle, or more generally a cycle of matter, [1] is the movement and transformation of chemical elements and compounds between living organisms, the atmosphere, and the Earth's crust. Major biogeochemical cycles include the carbon cycle, the nitrogen cycle and the water cycle. In each cycle, the chemical element or molecule is ...

  3. Weathering - Wikipedia

    en.wikipedia.org/wiki/Weathering

    Weathering is the deterioration of rocks, soils and minerals (as well as wood and artificial materials) through contact with water, atmospheric gases, sunlight, and biological organisms. It occurs in situ (on-site, with little or no movement), and so is distinct from erosion , which involves the transport of rocks and minerals by agents such as ...

  4. Marine mercury pollution - Wikipedia

    en.wikipedia.org/wiki/Marine_mercury_pollution

    Mercury can enter seas and the open ocean as a result of the down stream movement and re-deposition of contaminated sediments from urban estuaries. [12] For example, high total Hg content up to 5 mg/kg and averaging about 2 mg/kg occur in the surface sediments and sediment cores of the tidal River Mersey, UK, due to discharge from historical industries located along the banks of the tidal ...

  5. Abrasion (geology) - Wikipedia

    en.wikipedia.org/wiki/Abrasion_(geology)

    Abrasion is a process of weathering that occurs when material being transported wears away at a surface over time, commonly occurring with ice and glaciers. The primary process of abrasion is physical weathering. Its the process of friction caused by scuffing, scratching, wearing down, marring, and rubbing away of materials.

  6. Weathering rind - Wikipedia

    en.wikipedia.org/wiki/Weathering_rind

    The use of weathering rinds in relative dating is widely used in Arctic, Antarctic, and alpine regions and in the correlation of glacial moraines and tills and fluvial sediments and terraces. [6] [7] [8] In addition, weathering rinds have been used to determine the absolute amount of time gravel-size rock has been exposed to the weathering ...

  7. Environmental impact of iron ore mining - Wikipedia

    en.wikipedia.org/wiki/Environmental_impact_of...

    Water is one of the major natural resources that is being polluted by iron ore mining operations. [25] In order to achieve sustainability, Earth's streams, rivers, lakes, and oceans must remain uncontaminated. The extraction of iron ore can cause surface runoff and leachate leading to the pollution of nearby water bodies. [26]

  8. Aeolian processes - Wikipedia

    en.wikipedia.org/wiki/Aeolian_processes

    Wind erosion of soil at the foot of Chimborazo, Ecuador Rock carved by drifting sand below Fortification Rock in Arizona (Photo by Timothy H. O'Sullivan, USGS, 1871). Aeolian processes, also spelled eolian, [1] pertain to wind activity in the study of geology and weather and specifically to the wind's ability to shape the surface of the Earth (or other planets).

  9. Runaway greenhouse effect - Wikipedia

    en.wikipedia.org/wiki/Runaway_greenhouse_effect

    The water vapour reaches the stratosphere and escapes into space via hydrodynamic escape, resulting in a desiccated planet. [3] This likely happened in the early history of Venus. In 2012 study about climate change it was quoted that 'Earth presently absorbs around 240 W m −2 of solar radiation. Increasing carbon dioxide concentration will ...

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