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  2. Ferrofluid - Wikipedia

    en.wikipedia.org/wiki/Ferrofluid

    Ferrofluid is a liquid that is attracted to the poles of a magnet. It is a colloidal liquid made of nanoscale ferromagnetic or ferrimagnetic particles suspended in a ...

  3. Rock (geology) - Wikipedia

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

    The use of rock has had a huge impact on the cultural and technological development of the human race. Rock has been used by humans and other hominids for at least 2.5 million years. [22] Lithic technology marks some of the oldest and continuously used technologies. The mining of rock for its metal content has been one of the most important ...

  4. Formation of rocks - Wikipedia

    en.wikipedia.org/wiki/Formation_of_rocks

    This article discusses how rocks are formed. There are also articles on physical rock formations, rock layerings , and the formal naming of geologic formations. Terrestrial rocks are formed by three main mechanisms: Sedimentary rocks are formed through the gradual accumulation of sediments: for example, sand on a beach or mud on a river bed. As ...

  5. Thunderegg - Wikipedia

    en.wikipedia.org/wiki/Thunderegg

    A geode is a simple term for a rock with a hollow in it, often with crystal formation/growth. A thunderegg on the other hand is a specific geological structure . A thunderegg may be referred to as a geode if it has a hollow in it, but not all geodes are thundereggs because there are many different ways for a hollow to form.

  6. Geology of Guernsey - Wikipedia

    en.wikipedia.org/wiki/Geology_of_Guernsey

    The majority of rock exposures on the Island may be found along the coastlines, with inland exposures scarce and usually highly weathered. There is a broad geological division between the north and south of the Island. The Southern Metamorphic Complex is elevated above the geologically younger, lower lying Northern Igneous Complex. Guernsey has ...

  7. Magnetite - Wikipedia

    en.wikipedia.org/wiki/Magnetite

    The magnetite, eroded from rocks, is carried to the beach by rivers and concentrated by wave action and currents. Huge deposits have been found in banded iron formations. [33] [34] These sedimentary rocks have been used to infer changes in the oxygen content of the atmosphere of the Earth. [35]

  8. Rob Manfred: Dodgers not breaking rules, but says he and ...

    www.aol.com/rob-manfred-lauds-mlbs-popularity...

    Rob Manfred would like to see teams share their TV revenues and would welcome a salary cap, but won't drop any demands in their next CBA agreement.

  9. Pottsville Formation - Wikipedia

    en.wikipedia.org/wiki/Pottsville_Formation

    The Pennsylvanian Pottsville Formation is a mapped bedrock unit in Pennsylvania, western Maryland, West Virginia, Ohio, and Alabama.It is a major ridge-former in the Ridge-and-Valley Appalachians of the eastern United States. [3]