funnel pit
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Pit crater — A pit crater (also called a subsidence crater) is a depression formed by a sinking of the ground surface lying above a void or empty chamber, rather than by the eruption of a volcano or lava vent. [cite web… … Wikipedia
pit — Synonyms and related words: American Stock Exchange, Amex, L, R, Wall Street, abysm, abyss, acorn, acting area, agora, alveolation, alveolus, amphitheater, antrum, apron, apron stage, arena, armpit, athletic field, audience, auditorium, auditory … Moby Thesaurus
Tunnel pit — Tunnel Tun nel, n. [F. tonnelle a semicircular, wagon headed vault, a tunnel net, an arbor, OF. also tonnel; dim. of tonne a tun; so named from its resemblance to a tun in shape. See {Ton}.] 1. A vessel with a broad mouth at one end, a pipe or… … The Collaborative International Dictionary of English
open-pit — /oh peuhn pit /, adj. Mining. noting or pertaining to a type of surface mining in which massive, usually metallic mineral deposits are removed by cutting benches in the walls of a broad, deep funnel shaped excavation. [1910 15] * * * … Universalium
Angle of repose — For the Wallace Stegner novel, see Angle of Repose (novel). For the friction angle between two solid objects, see Friction. For the Sleepytime Gorilla Museum song of the same name, see In Glorious Times. Angle of repose The angle of repose or,… … Wikipedia
Condensation trap — The building of Condensation traps or moisture traps (as they are more commonly known amongst Survivalists) is a survival skill to collect drinking water. Contents 1 History 2 Methods 2.1 First method 2.2 … Wikipedia
The Impossible Planet — Infobox Doctor Who episode| number=178a serial name= The Impossible Planet caption= The black hole above the rocky landscape of Krop Tor show=DW type=episode doctor=David Tennant (Tenth Doctor) companion=Billie Piper (Rose Tyler) guests= * Danny… … Wikipedia
antlion — ant lion n. 1. Any of various insects of the family Myrmeleontidae, the adults of which resemble dragonflies. 2. The large jawed larva of the ant lion, which digs a conical crater in the sand designed to trap ants and other insects for food. Also … Universalium
Michigan's Adventure — Location Muskegon, Michigan, U.S. Coordinates … Wikipedia
Nuclear weapon design — The first nuclear weapons, though large, cumbersome and inefficient, provided the basic design building blocks of all future weapons. Here the Gadget device is prepared for the first nuclear test: Trinity. Nuclear weapon designs are physical,… … Wikipedia
