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	Sill (Geology) - LoveToKnow 1911
		SILL, in geology, an intrusive mass of igneous rock which consolidated beneath the surface and has a large horizontal extent in comparison with its thickness.
		The rocks in which it lies belong to the Carboniferous Limestone series, and the Sill is probably one of the manifestations of the volcanic activity which occurred during the later part of the carboniferous period.
		These sills are harder and more resistant than the tuffs and vesicular lavas, and on the hill slopes their presence is often indicated by small vertical steps, while on the cliff faces their columnar jointing is often very conspicuous.
	www.1911encyclopedia.org /Sill_(Geology) (1666 words)

	sill - Search Results - MSN Encarta
		Sills, Beverly (1929-2007), American soprano, who combined critical success with international popularity as a result of her clear, supple...
		In geology, a sill is a tabular, often horizontal mass of igneous rock that has been intruded laterally between older layers of sedimentary rock, beds of volcanic lava or tuff, or even along the...
		The site of Fort Sill was staked out on January 8, 1869 by Maj. Gen.
	encarta.msn.com /sill.html (207 words)

	NationMaster - Encyclopedia: Sill (geology)
		In geology, a sill is a tabular, often horizontal mass of igneous rock that has been intruded laterally between older layers of sedimentary rock, beds of volcanic lava or tuff, or even along the direction of foliation in metamorphic rock.
		Sills are typically from mafic magmas, as the felsic magmas are not as fluid.
		Sills are distinguishable from the similarly formed dikes and dome forming laccoliths because sills are horizontal in orientation to the surface.
	www.nationmaster.com /encyclopedia/Sill-%28geology%29 (349 words)

	Geology Encyclopedia (Site not responding. Last check: 2007-10-31)
		Geology (from Greek γη- (ge-, "the earth") and λογος (logos, "word", "reason")) is the science and study of the solid matter of the Earth, its composition, structure, physical properties, history and the processes that shape it.
		The word "geology" was first used by Jean-André Deluc in the year 1778 and introduced as a fixed term by Horace-Bénédict de Saussure in the year 1779.
		In geology, when an igneous intrusion cuts across a formation of sedimentary rock, it can be determined that the igneous intrusion is younger than the sedimentary rock.
	www.hallencyclopedia.com /topic/Geology.html (1720 words)

	tScholars.com \| Sill (geology) (Site not responding. Last check: 2007-10-31)
		In geology, a sill is a tabular, often horizontal mass of igneous rock that has been intruded laterally between older layers of sedimentary rock, beds of volcanic lava or tuff, or even along the direction of foliation in metamorphic rock.
		Sills are always parallel to beds (layers) of country rock.
		Certain mafic and ultramafic layered intrusions are a variety of sill that often contain important ore deposits.
	www.tscholars.com /encyclopedia/Sill_%28geology%29 (258 words)

	Geology of the Rogerley Mine
		Though the Weardale Granite had been intruded, exposed by erosion, and reburied prior to the emplacement of the Northern Pennine Orefield, it is probable that the granite acted as a localizing conduit for the heat driving the mineralizing process.
		Several igneous dikes and sills have been intruded into the Carboniferous sedimentary sequence, the largest of which is the Great Whin Sill, a quartz-orthopyroxene diabase (dolerite in British usage) of late Carboniferous age.
		With the exception of the Great Whin Sill, which is a dolerite (diabase), units named “Sill” and “Hazel” are, in fact, sandstones, the names of which predate modern stratigraphic nomenclature (illustration by Bill Besse, from King 1982).
	www.ukminingventures.com /geology.htm (1337 words)

	Free Online Geology Curriculum - Chapter 5 - Igneous Rocks
		A sill is a tabular intrusive layer of rock that is parallel, or concordant to,
		Sills are typically from mafic magmas, as the felsic magmas are not as fluid.
		Sills commonly have inclusions, which are blocks and pieces of the surrounding rocks embedded in the igneous material of the sill.
	www.answersincreation.org /curriculum/geology/geology_chapter_5.htm (2171 words)

	sill - Hutchinson encyclopedia article about sill
		Sills are intrusions that flow between rock layers.
		A sill is usually formed of dolerite, a rock that is extremely resistant to erosion and weathering, and often forms ridges in the landscape or cuts across rivers to create waterfalls.
		The window frame which prevented anyone from sitting on the outer sill was being forced out by two footmen, who were evidently flurried and intimidated by the directions and shouts of the gentlemen around.
	encyclopedia.farlex.com /sill (304 words)

	Fluidisation pipes: evidence of large-scale watery catastrophe
		that are larger in the middle of the sill.
		The complete thickness of the sill must have intruded quickly over the whole area before the water-logged sediments were able to quench and harden the magma.
		The entire sill must have been emplaced very quickly before the overlying water had time to boil and establish the strong circulation that fluidised the sand.
	www.answersingenesis.org /tj/v14/i3/pipes.asp (1092 words)

	SILL - Online Information article about SILL
		Among the lavas of the basaltic plateaus there is great abundance of sills, which are so numerous, so thin and so nearly concordant to the bedding of the effusive rocks that there is great difficulty in distinguishing them.
		dike or sill among the older lavas or in the sedimentary rocks beneath.
		The connexion between sills and dikes is very close; both of them are of subterranean consolidation, but the dikes occupy vertical or highly inclined fissures, while the sills have a marked tendency to a horizontal position.
	encyclopedia.jrank.org /SHA_SIV/SILL.html (2152 words)

	CNN - 'Annals of the Former World' - May 7, 1999
		The sill may have been stressed pretty severely by the tilting of the fault block, Kleinspehn says, or it may have cracked in response to the release of weight its the load above it was eroded away.
		Geology was called a descriptive science, and with its pitted outwash plains and drowned rivers, its hanging tributaries and starved coastlines, it was nothing if not descriptive.
		The New Geology is the package phrase for the effects of the revolution that occurred in earth science in the nineteen-sixties, when geologists clambered onto seafloor spreading, when people began to discuss continents in terms of their velocities, and when the interactions of some twenty parts of the globe became known as plate tectonics.
	www.cnn.com /books/beginnings/9905/annals.of.former/index.html (6367 words)

	Sill (geology) Summary
		Sills are sheet-like or tabular because the magma intrusion moves or intrudes horizontally before solidifying.
		Because sills are an intrusive rock formation in contact with the host or country rock in the horizontal plane, they are often parallel to foliation or bedding planes (e.g., parallel to underlying sedimentary bedding planes).
		Sill texture is a function of the time it takes for the magma to cool and solidify.
	www.bookrags.com /Sill_(geology) (453 words)

	Highbeam Encyclopedia - Search Results for Sills,
		sill Sheet-like intrusion of igneous rock that is parallel to the bedding or other structure of the surrounding rock.
		Sill rock is normally medium-grained; basic sills (dolerites) are the commonest.
		Sills may range from a few inches to hundreds of feet thick and up to hundreds of miles long.
	www.encyclopedia.com /SearchResults.aspx?Q=Sills, (865 words)

	Bedrock Geology Bath 100K Report - Intrusive Rocks - Maine Geological Survey
		Minor metamorphosed dikes and sills of mafic and ultramafic composition are sporadically distributed in the Cape Elizabeth and Cushing Formations.
		From distribution of outcrops of the sill, the Cape Elizabeth Formation, and the Bucksport Formation, it would appear that the sill cuts across minor folds of the contact and is locally in contact with the two formations implying it postdates the inferred Boothbay thrust.
		The age of the Lincoln Sill is latest Silurian to earliest Devonian, based on a 418 ± 1 Ma U-Pb zircon age from the nonfoliated phase of the sill in the Liberty area, north of the Bath map sheet (Tucker and others, 2001).
	www.state.me.us /doc/nrimc/mgs/explore/bedrock/b42/intru.htm (3619 words)

	Minexchange.org - Travel and Tours guide. geology, mine, lesson, marine, total linhas aereas, cooper, guilin, aero ... (Site not responding. Last check: 2007-10-31)
		Geology (from Greek language Î³Î·- (ge-, "the earth") and Î»Î¿Î³Î¿Ï (logos, "word", "reason")) is the science and study of the solid matter of a celestial body, its composition, structure, physical properties, history and the processes that 3d shape it.
		The word "geology jobs " was first used by Jean-AndrÃ© Deluc in the year 1778 and introduced as a fixed term by Horace-BÃ©nÃ©dict de Saussure in the year 1779.
		Geology long island is formed largely of two spines of glacial moraine, with a large, sandy outwash plane beyond.
	www.minexchange.org /Geology.html (1255 words)

	sill - definition by dict.die.net (Site not responding. Last check: 2007-10-31)
		sill n 1: structural member consisting of a continuous horizontal timber forming the lowest member of a framework or supporting structure 2: (geology) a flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock
		Sill course (Arch.), a horizontal course of stone, terra cotta, or the like, built into a wall at the level of one or more window sills, these sills often forming part of it.
		Thill.] The shaft or thill of a carriage.
	dict.die.net /sill (189 words)

	Science 9-12 Geology
		Geology is a course that explores the origins and the connections between the physical, chemical, and biological processes of the Earth system.
		Students will experience the content of Geology through investigations and observations both in the field and the laboratory and through open-ended problem solving via cooperative learning and individual research.
		Geology will provide a means of connecting all disciplines of science including biology, chemistry and physics.
	www.state.tn.us /education/ci/cistandards2001/sci/ciscigeology.htm (2199 words)

	Bird River Sill \| Properties for Option \| Business Development \| Mineral Resources Division \| Manitoba Science, ... (Site not responding. Last check: 2007-10-31)
		A recently discovered mineralized zone in the Bird River sill reinforces the conviction that this mafic-ultramafic complex has a high probability to host economically significant Platinum-Group Elements (PGE) mineralizations, and that we may be able to better define the nature and stratigraphic position of this mineralization.
		Based on the lithologies intersected by drilling it is interpreted that the Galaxy prospect is hosted by a fragment of the portion of the sill known as the Chrome property which was emplaced by block faulting into its present position.
		It is thus thought that the Galaxy prospect indicates that stratigraphically lower parts of the Bird River sill may also have a good potential to host sulphide-bearing peridotites with higher PGE concentrations than hitherto identified.
	www.gov.mb.ca /iedm/mrd/busdev/properties/birdsill.html (485 words)

	Relative Dating Lab (Site not responding. Last check: 2007-10-31)
		The sedimentary rocks are older than the igneous rock which intrudes them. (In other words, the sedimentary rocks had to be there first, so that the igneous rocks would have something to intrude.) Or, you could say, the intrusion is younger than the rocks it cuts.
		You should remember from Physical Geology that a xenolith (which literally means "foreign rock") is a piece of surrounding rock (or "country rock") which becomes caught up in an intrusion.
		The question arises as to whether it is a sill or a lava flow.
	gpc.edu /~pgore/geology/historical_lab/relativedating.htm (1987 words)

	Geological Features of the Mid-Atlantic Region
		I have always been interested in the interrelationship between flora, fauna, and geology.
		One of the largest and best examples of an igneous sill is the 300-meter thick Palisades along the western shore of the Hudson River west and north of New York.
		A sill is a subsurface igneous body that parallels the structure of the surrounding rock.
	www.lonker.net /nature_geology_1.htm (353 words)

	Geology of the Wichita Mountains
		Excerpts from C.A. Merrit, School of Geology, University of Oklahoma and the Programs in Geosciences at the University of Texas at Dallas.
		At the beginning of the 20th Century, when conservationists thought about where it would be best to bring in herds of buffalo and other endangered species, the protected prairie sheltered by the Wichita Mountains was a logical choice.
		In the Wichita Refuge, lava flows are present in a belt south of Mt. Scott, extending from Elmer Thomas Lake westward along Little Medicine Creek for a couple of miles and in places northward across the paved highway.
	www.fws.gov /southwest/refuges/wichitamountains/geology.html (1163 words)

	Mount Rainier 100th Anniversary Symposium - Geology
		Sills are 0.5 to 150 m thick and traceable distances to 2 km.
		A few sills in the area of the intrusive center are "bulbous" in shape; that is, their thickness is 0.2 to 0.5 their lateral extent.
		A NW-striking dike of porphyritic quartz diorite, intruding the sills in the basin, is the youngest intrusion.
	www.nps.gov /mora/ncrd/symposium/geo.htm (4126 words)

	The Tufas of Pyramid Lake, Nevada (Site not responding. Last check: 2007-10-31)
		Sill elevations around Pyramid Lake are Darwin Pass (1,265 m), Mud Lake (1,177 m), Astor Pass (1,222 m), and Emerson Pass (1,207 m).
		The outer edge of the upper terrace is at 1,267 m, approximately the elevation of the overflow point (Darwin Pass Sill) to the Carson Desert subbasin.
		Existing data indicate that the level of Pyramid Lake often did not exceed the Mud Lake Sill elevation (1,177-1,183 m) during the past 8,000 years (Benson and others, 2002), suggesting that cementation of the old tufa mounds occurred during that time interval.
	www.plpt.nsn.us /geology/index.html (3473 words)

	Holyrood Park Geology (Site not responding. Last check: 2007-10-31)
		The Geology of the area has been at the centre of interest for geologists in Edinburgh, and far beyond, for centuries.
		He refers to the work of the Father of modern Geology, James Hutton, who taught in Edinburgh University and based his great theories of the formation of the Earth on the evidence he saw around him, not least in Holyrood Park.
		Its significance is that the sill must have cooled before this dyke was intruded, and therefore it must be a much later feature.
	www.geo.ed.ac.uk /arthurseat/geology/geology.html (1141 words)

	Burnt Island's Glacial Erratics of the Lincoln Sill, Maine
		Notice that the sill is part of the bedrock around Burnt Island to the west, east, and south (on Squirrel Island).
		The relationship of the sill to other rock types, including the igneous granites (former magma chambers) in the region is still being studied to learn more about the plate tectonic origin of Maine's bedrock.
		Knight, D. R., and Gaudette, H. E., 1991, Geology and petrology of the Lincoln Sill and related rocks, coastal Maine, in Ludman, A. (editor), Geology of the coastal lithotectonic block and neighboring terranes, eastern Maine and southern New Brunswick: New England Intercollegiate Geological Conference, 83rd Annual Meeting, September 27-29, 1991, Princeton, Maine, p.
	www.state.me.us /doc/nrimc/mgs/explore/bedrock/sites/nov00.htm (2203 words)

	Burnt Island's Glacial Erratics of the Lincoln Sill, Maine
		Notice that the sill is part of the bedrock around Burnt Island to the west, east, and south (on Squirrel Island).
		The relationship of the sill to other rock types, including the igneous granites (former magma chambers) in the region is still being studied to learn more about the plate tectonic origin of Maine's bedrock.
		Knight, D. R., and Gaudette, H. E., 1991, Geology and petrology of the Lincoln Sill and related rocks, coastal Maine, in Ludman, A. (editor), Geology of the coastal lithotectonic block and neighboring terranes, eastern Maine and southern New Brunswick: New England Intercollegiate Geological Conference, 83rd Annual Meeting, September 27-29, 1991, Princeton, Maine, p.
	www.maine.gov /doc/nrimc/mgs/explore/bedrock/sites/nov00.htm (2203 words)

	Young Naturalist Awards 2001
		A large accumulation of talus (rock pieces chipped off the sill) was piled up against the side of the sill, along with soil and vegetation, creating a sloping hillside down to the river (Figure 5).
		These right-angle fractures are present throughout the entire Palisades sill and are due to columnar jointing, which occurred while the magma was cooling.
		Large chunks of diabase are still tumbling off the sill, due to physical weathering, and large portions of the exposed rock are becoming rusted and eaten away by chemical weathering.
	www.amnh.org /nationalcenter/youngnaturalistawards/2001/max.html (2165 words)

	News \| Gainesville.com \| The Gainesville Sun \| Gainesville, Fla. (Site not responding. Last check: 2007-10-31)
		Sill (geology), a tabular mass of igneous rock that has been intruded laterally between layers of older rock
		Sill River, a tributary to the Inn River in Austria
		Sill (Colombian slang), slang for spill as in spill the beans – meaning to reveal a secret accidentally and in a comical manner.
	www.gainesville.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=sill (162 words)

	Bin's On-Line Dictionary (Site not responding. Last check: 2007-10-31)
		sill n 1: a continuous horizontal timber forming the lowest member of a framework or supporting structure 2: (geology) a flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock
		Sill course (Arch.), a horizontal course of stone, terra cotta, or the like, built into a wall at the level of one or more window sills, these sills often forming part of it.
		Thill.] The shaft or thill of a carriage.
	language.bin.org /ref/dict/?t=Sill (185 words)

	Geology of Puget Sound
		Made up of a series of underwater valleys and ridges called basins and sills, Puget Sound is deep, with an average depth of 450 feet.
		A relatively shallow sill at Admiralty Inlet separates the waters of the Strait of Juan de Fuca from the waters of Puget Sound proper.
		The two-layer circulation system is disturbed by shallow sills, a series of underwater valleys and ridges, which recirculate water from the surface back into the depths of the basin.
	exhibits.pacsci.org /puget_sound/PSGeology.html (780 words)

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