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Tunnel Construction. Tunnels are dug in types of materials varying from soft clay to hard rock. The method of tunnel construction depends on such factors as the ground conditions, the ground water conditions, the length and diameter of the tunnel drive, the depth of the tunnel, the logistics of supporting the tunnel excavation, the final use and shape of the tunnel and appropriate risk management.
Ground (art), a base for the paint layers of a picture. Coffee grounds, ground up coffee beans; Ground tissue, one of the three types of tissue systems in a plant; Ground term, in symbolic logic, a term with no variables; Ground (unit), a unit of area used in India; Ground (Dzogchen), the primordial state in Dzogchen
The World Trade Center site, often referred to as "Ground Zero" or "the Pile" immediately after the September 11 attacks, is a 14.6-acre (5.9 ha) area in Lower Manhattan in New York City. [ 1 ] [ 2 ] The site is bounded by Vesey Street to the north, the West Side Highway to the west, Liberty Street to the south, and Church Street to the east.
Minnesota Sen. Tina Smith ruled out a run for reelection in 2026 on Thursday, opening up a key Democratic seat during an election cycle in which the party is desperately hoping to make up lost ground.
Basset Hound: A breed that is low on the ground but high on love. David Crookes. February 14, 2025 at 1:39 AM ... never allow treats to make up more than 10% of a Basset Hound’s calorie intake.
alkyd ground is made of "oil-modified alkyd resin" (oil is added to improve drying) and are in use since the 1960s. Titanium white is used for color; oil ground was a lean lead-based primer, no longer used due to being a health hazard, modern "oil ground" is actually alkyd; genuine gesso ground is a lean ground typically used on top of the boards;
The three major classes of metamorphic rock are based upon the formation mechanism. An intrusion of magma that heats the surrounding rock causes contact metamorphism—a temperature-dominated transformation. Pressure metamorphism occurs when sediments are buried deep under the ground; pressure is dominant, and temperature plays a smaller role.
Land, also known as dry land, ground, or earth, is the solid terrestrial surface of Earth not submerged by the ocean or another body of water. It makes up 29.2% of Earth's surface and includes all continents and islands .