Surface mining is much more common, and produces, for example, 85 % of minerals ( excluding petroleum and natural gas ) in the United States, including 98 % of metallic ores.

Rock phosphate Surface mining | surface mine in western Senegal, near Taïba.

Surface mining of high-grade iron-ore remains an important part of the economy of the Iron Range.

Surface mining and some deep mining of coal continues in the immediate area.

# REDIRECT Surface mining # Strip_mining

Category: Surface mining

Surface coal mining in Wyoming in the United States

Surface mining and deep underground mining are the two basic methods of mining.

Surface mining accounts for around 80 percent of production in Australia, while in the US it is used for about 67 percent of production.

Category: Surface mining

Category: Surface mining

Category: Surface mining

Surface mining | Surface coal mine with dump truck | haul truck in foreground

Surface mining often alters the land characteristics, shape, topography, and geological make-up.

Surface mining involves quarrying which is excavating minerals by means of machinery such as cutting, cleaving, and breaking.

Category: Surface mining

* Surface mining

Surface coal mining had already started in the 16th century, though it was ended by the Thirty Years ' War and the industrial exploitation of coal did not begin until 1800.

Hansen said one of his most important achievements in the Senate was the passage of amendments to the Surface Mining Act which prevent mining companies from confiscating the wealth from private lands by means of following an oil bed onto adjacent properties.

Surface access was considered paramount because in a prolonged war scenario their raw material resources were insufficient ( Zeon's national strength was only 1 / 30 compared to the Federation ), and they soon after started various mining operations on Earth ( the biggest being the M ' Quve mining operations near Odessa ).

Still further south lies the Polar front, which is marked by a transition to very cold, relatively fresh, Antarctic Surface Water at the surface.

Surface immunoglobulin ( Ig ) is attached to the membrane of the effector B cells by its transmembrane region, while antibodies are the secreted form of Ig and lack the trans membrane region so that antibodies can be secreted into the bloodstream and body cavities.

Surface creep is the slow movement of soil and rock debris by gravity which is usually not perceptible except through extended observation.

Surface hoar is a cause of avalanches when it forms on top of snow.

Surface hydrology is the study of hydrologic processes that operate at or near Earth's surface.

Surface pressure is denoted by π and shares many similar properties with three-dimensional pressure.

Surface area is the total area of the faces and curved surface of the a solid figure.

Surface area is an assignment

Surface waves travel more slowly than P-waves and S-waves, but because they are guided by the surface of the Earth ( and their energy is thus trapped near the Earth's surface ) they can be much larger in amplitude than body waves, and can be the largest signals seen in earthquake seismograms.

Surface personnel often employ a piece of communications equipment called a " helium de-scrambler ," which electronically lowers the pitch of the diver's voice as it is relayed through the communications gear, making it easier to understand.

Surface waves span a wide frequency range, and the period of waves that are most damaging is usually 10 seconds or longer.

* Surface texture describes the amount of small-scale relief of the surface of a grain that is too small to influence the general shape.

Surface irrigation water normally contains salts in the order of 0. 5 g / l or more and the annual irrigation requirement is in the order of 10000 m < sup > 3 </ sup >/ ha or more so the annual import of salt is in the order of 5000 kg / ha or more.

The newest policy passed by Congress and the Obama Administration regarding highways is the Surface and Air Transportation Programs Extension Act of 2011.

Surface Structure is not present in Minimalist theories of syntax, and the most recent phase-based theories also eliminate LF and PF as unitary levels of representation.

Recently, cathodoluminescence performed in electron microscopes is being used to study Surface plasmon resonance in metallic Nanoparticles.

Surface science is the study of physical and chemical phenomena that occur at the interface of two phases, including solid – liquid interfaces, solid – gas interfaces, solid – vacuum interfaces, and liquid-gas interfaces.

Surface science is closely related to interface and colloid science.

Surface science is of particular importance to the field of heterogeneous catalysis.

Surface weather analysis is a special type of weather map that provides a view of weather elements over a geographical area at a specified time based on information from ground-based weather stations.

By 2001, the various surface analyses done within the National Weather Service were combined into the Unified Surface Analysis, which is issued every six hours and combines the analyses of four different centers.