song and dance was a notable element of pre-contact northwest culture. the abundant food supply for coastal tribes like the tlingit, haida, tsimishan, kwakiutl, makah, quinault and coast salish peoples, and other puget sound salish peoples, is credited for allowing a settled lifestyle with elaborate artistic expression including woven clothing and basketry, communal longhouses and dance and music.
underground nuclear testing is the test detonation of nuclear weapons that is performed underground. when the device being tested is buried at sufficient depth, the explosion may be contained, with no release of radioactive materials to the atmosphere.. the extreme heat and pressure of an underground nuclear explosion causes changes in the surrounding rock.
shale gas in the united states is an available source of natural gas.led by new applications of hydraulic fracturing technology and horizontal drilling, development of new sources of shale gas has offset declines in production from conventional gas reservoirs, and has led to major increases in reserves of us natural gas.largely due to shale gas discoveries, estimated reserves of natural gas in .
the united states was the world's largest producer of phosphate rock from at least 1900, up until 2006, when us production was exceeded by that of china. in 2015, the us produced 12 percent of the world's phosphate rock.
oil shale is an organic-rich fine-grained sedimentary rock containing kerogen from which liquid hydrocarbons can be produced, called shale oil. shale oil is a substitute for conventional crude oil; however, extracting shale oil from oil shale is more costly than the production of conventional crude oil both financially and in terms of its environmental impact. deposits of oil shale occur around the world, including major deposits in the united states. a 2016 estimate of global deposits set the t
the permian basin is a large sedimentary basin in the southwestern part of the united states.the basin contains the mid-continent oil field province. this sedimentary basin is located in western texas and southeastern new mexico.it reaches from just south of lubbock, past midland and odessa, south nearly to the rio grande river in southern west central texas, and extending westward into the .
crack cocaine, also known simply as crack or rock, is a free base form of cocaine that can be smoked. crack offers a short, intense high to smokers. the manual of adolescent substance abuse treatment calls it the most addictive form of cocaine. crack first saw widespread use as a recreational drug in primarily impoverished neighborhoods in new york city, philadelphia, baltimore, washington, d .
may 1, 1947 – united states – huntingdon, pennsylvania, usa: two huge inch-thick steel plates on a pennsylvania railroad freight train strike and cut open the side of the first coach of the 15-car new york to st. louis american, killing at least four passengers and injuring 40 others in a 1:47 a.m. est accident five miles w of the town. the .
many factors determine the level of hazard, including: available fault current, soil type, soil moisture, temperature, underlying rock layers, and clearing time to interrupt a fault. earth potential rise is a safety issue in the coordination of power and telecommunications services.
shale gas in the united states is an available source of natural gas. led by new applications of hydraulic fracturing technology and horizontal drilling , development of new sources of shale gas has offset declines in production from conventional gas reservoirs, and has led to major increases in reserves of us natural gas.