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Topic: Evaporite

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	Evaporite - Definition, explanation
		Evaporites start to precipitate when their concentration in water reaches such a level that they can no longer exist as solutes.
		Evaporite minerals are geologically important because they clearly are related to the environmental conditions that existed at the time of their deposition, namely an arid environment, such as coastal plain or restricted basinal, e.g.
		Evaporites can also be easily recrystallized in laboratories in order to postulate the specific characteristics of their formation.
	www.calsky.com /lexikon/en/txt/e/ev/evaporite.php (346 words)

	Highbeam Encyclopedia - Search Results for Evaporite
		Messinian An important stage of the Late Miocene, about 7.2–5.3 Ma ago, marked by thick evaporite deposits in the Mediterranean, suggesting the Straits of Gibraltar were closed and the Mediterranean was reduced to a series of evaporite basins.
		Termed evaporite deposits because they formed by the evaporation of saline water in partially enclosed basins, they...
		Evaporite layers frequently occur at the toe of...
	www.encyclopedia.com /SearchResults.aspx?Q=Evaporite (1062 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal
		Evaporites (IPA:) are water-soluble, mineral sediments that result from the evaporation of bodies of surficial water.
		In order for a formation to be recognised as evaporitic it may simply require recognition of halite pseudomorphs, sequences composed of some proportion of evaporite minerals, and recognition of mud crack textures or other textures.
		Evaporites are important economically because of their mineralogy, their physical properties in-situ and their behaviour within the subsurface.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=evaporite (606 words)

	Bacterial life in ancient salt
		Age estimates based on bacterial decay rates are qualitative or semi-quantitative at best. Nevertheless, improved age estimates for the Salado evaporite might be possible by estimating the average temperature of the Salado evaporite and determining the decay rate of the bacterium Bacillus marismortui under conditions representative for water inclusions.
		The presence of viable spores of bacteria in water inclusions in the Permian Salado evaporite, in combination with bacterial decay rates, is incompatible with the age of 250 Ma reported for this evaporite.
		Estimates of the average temperature of the evaporite over time and measurement of times of decimation for Bacillus marismortui within a wide range of temperatures are key parameters for improving the ‘bacterial age method’ estimate.
	www.answersingenesis.org /tj/v16/i2/life.asp (1407 words)

	The primary sealing units for the Weyburn Midale reservoir;
		The Frobisher Evaporite is 0 to 7m thick and underlies the Weyburn Midale reservoir in the northern portion of the Weyburn field but is absent in the southern half of the field.
		The Frobisher Evaporite consists of nodular to chicken-wire anhydrite intercalated with reddish dolomudstone.
		Underlying the Frobisher Evaporite are the Frobisher Beds, a series of oolitic shoals with wackestones deposited in intershoal lows that appear to have controlled the deposition and thickness of the Frobisher Evaporite.
	www.uregina.ca /geology/Seminars/2004ErikNickel.htm (446 words)

	Purbeck Formation - Sedimentology of Evaporites
		This diagram shows the distribution of the breccia, the Broken Beds, in the basal Purbeck Formation of Dorset and the relationship of this breccia to the occurrence of evaporite facies.
		Abstract (slightly enlarged and relating to fig 2, alongside): Evaporites and remains of "vanished evaporites" are widely distributed in the Purbeck Formation of southern England.
		Abstract: Modern sabkha and lagoonal, evaporitic environments are well-developed in the Mediterranean coastal zone of Egypt between Alexandria and El Alamein.
	www.soton.ac.uk /~imw/Purbeck-evaporites.htm (1725 words)

	The Fossil Forest Exposure, Lulworth Cove, Dorset, - Geology of the Wessex Coast, by Ian West
		An environment with some similarities in terms of semi-arid climate, latitude (although in wrong hemisphere) and presence of evaporites to that of the Purbeck fossil forest environment is that of the coastal Coorong area of South Australia, shown here.
		These evaporites of calcium sulphate occur in boreholes in the Isle of Wight and southeast England at this horizon as anhydrite (calcium sulphate without water of crystallisation).
		Evaporites and associated sediments of the basal Purbeck Formation (Upper Jurassic) of Dorset.
	www.soton.ac.uk /~imw/forest.htm (8080 words)

	EVAPORITE KARST HAZARDS OF THE LOWER FORK RIVER VALLEY, WEST-CENTRAL COLORADO
		The valley is centered in the Carbondale Collapse Center, a 1,165 km2 structural depression that has collapsed 1,200 meters in response to late Cenozoic plastic flow and dissolution of the evaporite.
		Deeply buried evaporite, under very high overburden pressures, flows towards the river valley where overburden pressures are markedly reduced.
		Exposures of evaporite rock along the valley walls reveal highly contorted fine-grained clastic beds, massive gypsum, and evidence of diapiric piercement.
	gsa.confex.com /gsa/2002AM/finalprogram/abstract_41192.htm (473 words)

	Oilfield Glossary: Term 'evaporite'
		A class of sedimentary minerals and sedimentary rocks that form by precipitation from evaporating aqueous fluid.
		Common evaporite minerals are halite, gypsum and anhydrite, which can form as seawater evaporates, and the rocks limestone and dolostone.
		Certain evaporite minerals, particularly halite, can form excellent cap rocks or seals for hydrocarbon traps because they have minimal porosity and they tend to deform plastically (as opposed to brittle fracturing that would facilitate leakage).
	www.glossary.oilfield.slb.com /Display.cfm?Term=evaporite (108 words)

	CNW Group \| WAVEFORM ENERGY LTD. \| WaveForm Energy announces strong production growth to exit 2005
		The Company had an active and successful fourth quarter of drilling in the Midale Evaporite zone, in the Tableland area of southeast Saskatchewan, with one rig running steadily through the quarter, and a second dedicated rig from late November.
		Since drilling and completing its first Midale Evaporite well in August of 2005 the Company has enjoyed a 100 percent drilling success rate and plans to continue with its 30 well development program in the Midale Evaporite field.
		We look forward to continued success in 2006, building shareholder value through the drill bit." About WaveForm Energy WaveForm is a junior oil and gas company focused on the acquisition, exploration and development of oil and natural gas in Western Canada with a particular emphasis on exploration in the Tableland area of southeast Saskatchewan.
	www.newswire.ca /en/releases/archive/January2006/09/c0804.html (654 words)

	SPACE.com -- The Chemistry of Mars
		The detection of magnesium sulfate kieserite, which is similar to epsom salt, and bromide salts were also telltale signs that water existed on the red planet.
		Both are evaporite minerals, and found on Earth in regions where seas evaporate over time.
		Benton Clark III, a Mars Exploration Rover team member, said Opportunity's observations showed that the levels of bromide salts increased towards the bottom of the outcrop, but the sulfur levels increased towards the top.
	www.space.com /scienceastronomy/marswater_chemistry_040303.html (661 words)

	Asquith Storage Project - Prairie Evaporite
		Back in geologic time, a salt sea covered a large part of Western Canada, and when the sea dried up, a salt bed remained which over time was covered by other layers.
		This geological formation, called the Prairie Evaporite, underlies a great portion of Saskatchewan.
		The salt bed is basically non-porous with an impermeable cap rock overlying it.
	www.transgas.com /newsroom/projects/asquith/PrarieEvaporite.asp (395 words)

	Evaporite
		Look closely at the laminations, the dark is clay and carbonate enriched while the white is the calcium sulfate (
		This is a classic sample of laminated evaporite.
		Aeolian silt lens deposited in an evaporitic mudflat.
	people.uncw.edu /dockal/gly312/evaporite/evaporite.htm (717 words)

	Definition of evaporite - Merriam-Webster Online Dictionary
		Learn more about "evaporite" and related topics at Britannica.com
		Find more about "evaporite" instantly with Live Search
		See a map of "evaporite" in the Visual Thesaurus
	www.m-w.com /cgi-bin/dictionary?va=evaporitic (41 words)

	AllRefer.com - evaporite Information
		Because of the concentrations of different dissolved salts in seawater, halite accounts for about 95% of the chlorides precipitated if evaporation is complete.
		More unusual evaporite minerals include borates (for example borax, hydrous sodium borate) and sulphates (for example glauberite, a combined sulphate of sodium and calcium).
		Helicon Publishing is a division of Research Machines.
	www.allrefer.com /evaporite (243 words)

	Extinct 129I in Halite from a Primitive Meteorite: Evidence for Evaporite Formation in the Early Solar System -- Whitby ...
		Extinct 129I in Halite from a Primitive Meteorite: Evidence for Evaporite Formation in the Early Solar System -- Whitby et al.
		Jump to: Page Content, Section Navigation, Site Navigation, Site Search, Account Information, or Site Tools.
		I in Halite from a Primitive Meteorite: Evidence for Evaporite Formation in the Early Solar System
	www.sciencemag.org /cgi/content/short/288/5472/1819 (293 words)

	Evaporite Sequences in Petroleum Exploration:271080624X:Chambre syndicale de la recherche et de la production du ...
		Evaporite Sequences in Petroleum Exploration:271080624X:Chambre syndicale de la recherche et de la production du pe´trole et du gaz naturel:eCampus.com
		Plus, Take 90 Days to Pay on $250 or more!
		Volume 1: Geological Methods is concerned with the surveys of evaporite sequences by drilling, geologic methods and derived well logs.
	www.ecampus.com /book/271080624X (96 words)

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