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  2. Kola Superdeep Borehole - Wikipedia

    en.wikipedia.org/wiki/Kola_Superdeep_Borehole

    The stated areas of study of the Kola Superdeep Borehole were the deep structure of the Baltic Shield, seismic discontinuities and the thermal regime in the Earth's crust, the physical and chemical composition of the deep crust and the transition from upper to lower crust, lithospheric geophysics, and to create and develop technologies for deep ...

  3. Scientific drilling - Wikipedia

    en.wikipedia.org/wiki/Scientific_drilling

    Scientific drilling into the Earth is a way for scientists to probe the Earth's sediments, crust, and upper mantle.In addition to rock samples, drilling technology can unearth samples of connate fluids and of the subsurface biosphere, mostly microbial life, preserved in drilled samples.

  4. Digging - Wikipedia

    en.wikipedia.org/wiki/Digging

    Movements of the ploughman when digging A dog digging on a beach.. Digging, also referred to as excavation, is the process of using some implement such as claws, hands, manual tools or heavy equipment, to remove material from a solid surface, usually soil, sand or rock on the surface of Earth.

  5. Trench - Wikipedia

    en.wikipedia.org/wiki/Trench

    A gas main being laid in a trench. A trench is a type of excavation or depression in the ground that is generally deeper than it is wide (as opposed to a swale or a bar ditch), and narrow compared with its length (as opposed to a simple hole or pit).

  6. Piling - Wikipedia

    en.wikipedia.org/wiki/Deep_foundation

    For example, the Horns Rev wind farm in the North Sea west of Denmark utilizes 80 large monopiles of 4 metres diameter sunk 25 meters deep into the seabed, [4] while the Lynn and Inner Dowsing Wind Farm off the coast of England went online in 2008 with over 100 turbines, each mounted on a 4.7-metre-diameter monopile foundation in ocean depths ...

  7. Worksheet - Wikipedia

    en.wikipedia.org/wiki/Worksheet

    The form comes with two worksheets, one to calculate exemptions, and another to calculate the effects of other income (second job, spouse's job). The bottom number in each worksheet is used to fill out two if the lines in the main W4 form. The main form is filed with the employer, and the worksheets are discarded or held by the employee.

  8. Instructional materials - Wikipedia

    en.wikipedia.org/wiki/Instructional_materials

    3D model used for teaching geometry. Instructional materials, also known as teaching materials, learning materials, or teaching/learning materials (TLM), [1] are any collection of materials including animate and inanimate objects and human and non-human resources that a teacher may use in teaching and learning situations to help achieve desired learning objectives.

  9. Water surface searches - Wikipedia

    en.wikipedia.org/wiki/Water_surface_searches

    Water surface searches are procedures carried out on or over the surface of a body of water with the purpose of finding lost vessels, persons, or floating objects, which may use one or more of a variety of search patterns depending on the target of the search, as the direction and rate of drift vary depending on the characteristics of the target and the water and weather conditions at the time.

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