American Heritage® Dictionary of the English Language, Fourth Edition
- n. A fissile rock composed of layers of claylike, fine-grained sediments.
Century Dictionary and Cyclopedia
- n. A shell or husk.
- To take off the shell or coat of.
- n. Clay, or argillaceous material, which has a fissile structure, or which splits readily into thin leaves. Shale differs from slate in being decidedly less firmly consolidated; but there is often a gradual passage of one into the other.
- n. A shell or husk; a cod or pod.
- n. geology A fine-grained sedimentary rock of a thin, laminated, and often friable, structure.
- v. To take off the shell or coat of.
GNU Webster's 1913
- n. A shell or husk; a cod or pod.
- n. (Geol.) A fine-grained sedimentary rock of a thin, laminated, and often friable, structure.
- v. To take off the shell or coat of; to shell.
- n. a sedimentary rock formed by the deposition of successive layers of clay
- Middle English schale 'shell, husk; scale', from Old English scealu 'shell, husk, pod', from Proto-Germanic *skalō (compare West Frisian skaal 'dish', Dutch schaal 'shell', German Schale 'husk, pod'), from Proto-Indo-European *(s)kelo- 'split, cleaved' (compare Lithuanian skalà 'splinter', Old Church Slavonic skala 'rock, stone', Albanian halë 'fish bone, splinter', Sanskrit kalá 'small part'), from *(s)kel- 'to split, cleave' (compare Hittite iškalla 'to tear apart, slit open', Lithuanian skélti 'to split', Ancient Greek skállein 'to hoe, harrow'). (Wiktionary)
- Probably from Middle English, shell, from Old English scealu; see skel-1 in Indo-European roots. (American Heritage® Dictionary of the English Language, Fourth Edition)
“Heating oil shale to a sufficiently high temperature will drive off a vapor which processing can distill (retort) to yield a petroleum-like shale oil-a form of non-conventional oil-and combustible shale gas (the term shale gas can also refer to gas occurring naturally in shales).”
“The amount of water it takes to get that oil shale is pretty much all the water we have.”
“Bloomberg News Drilling in shale-gas formations, as here near Montrose, Pa., has contributed to a near-record U.S. supplies of natural gas.”
“India plans to sign an initial agreement with the U.S. in shale gas exploration, as it prepares to auction blocks by the end of next year to tap the fuel source, top oil ministry officials said.”
“MUMBAI -- India plans to sign an initial agreement with the U.S. in shale gas exploration, as it prepares to auction blocks by the end of next year to tap the fuel source, top oil ministry officials said Monday.”
“The South Asian nation's interest in shale gas stems from the fact that the U.S. has attracted heavy investments in the sector from global energy giants such as Royal Dutch Shell and Exxon Mobil as well as Reliance Industries, India's largest company by market value.”
“The South Asian nation 's interest in shale gas stems from the fact that the U.S. has attracted heavy investments in the sector from global energy giants such as Royal Dutch Shell PLC and Exxon Mobil Corp. as well as Reliance Industries Ltd.,”
“CNOOC Ltd. CEO Yang Hua said that The cooperation with Chesapeake in shale oil and natural gas is consistent with our value-driven overseas development strategy.”
“The shale is part of a 600-mile-long geological formation containing a huge reservoir of natural gas.”
“I agree that getting oil from shale is not the answer.”
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