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Topic: Chalk formation

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	Chalk - LoveToKnow 1911
		In certain parts of the formation layers of nodular flints (q.v.) abound; in parts, it is inclined to be sandy, or to contain grains of glauconite which was originally confounded with another green mineral, chlorite, hence the name "chloritic marl" applied to one of the subdivisions of the chalk.
		In its purest form chalk consists of from 95 to 99% of calcium carbonate (carbonate of lime); in this condition it is composed of a mass of fine granular particles held together by a somewhat feeble calcareous cement.
		Chalk is employed in the manufacture of carbonate of soda, in the preparation of carbon dioxide, and in many other chemical processes; also for making paints, crayons and tooth-powder.
	www.1911encyclopedia.org /Chalk (1115 words)

	Chalk Formation - Wikipedia, the free encyclopedia
		The Chalk Formations of Europe are thick deposits of chalk, a soft porous white limestone, deposited in a marine environment during the upper Cretaceous Period.
		In the Upper Chalk fossils may be abundant and include the bivalve Spondylus, the brachiopods Terebratulina and Gibbithyris, the echinoids Sternotaxis, Micraster, Echinocorys, and Tylocidaris, the crinoid Marsupites, and the small sponge Porosphaera.
		The youngest beds of the Upper Chalk formation in England are found on the coast of Norfolk.
	en.wikipedia.org /wiki/Chalk_Formation (960 words)

	Chalk formation fossils horizons cliffs beach Dover
		Chalk is white because it is formed from the colourless skeletons of marine plankton.
		Chalk cliffs are a familiar feature of the South and East coasts of England, and Chalk downland runs between Devon and Yorkshire and across the counties of the SE.
		Occasionally, chalk sediment was transported downslope and buried the inhabitants of the sea floor alive.
	www.discoveringfossils.co.uk /chalkformationfossils.htm (1316 words)

	Chalk1
		Chalk occupies the high cliffs from there to Dover and thence as far as Kingsdown, where the cliffs are lower, obscured by vegetation and set back a short distance from the sea.
		In this new classification, the base of the Upper Chalk is taken not at the (local) onset of conspicuous nodular flints as before, but at the onset of nodular chalk at the (redefined) base of the Lewes Chalk.
		The greater part of the Holywell Chalk is characterised by shell-detrital (predominantly fragmented and comminuted Mytiloides spp.) and intraclastic chalks.
	www.geologyshop.co.uk /chalk1.htm (3055 words)

	The Variegated Beds of the Welton Chalk Formation
		Of all of the several hundred metres of the Chalk still exposed in Yorkshire and Lincolnshire, there is arguably none more interesting, and certainly none more conspicuous, than the thin sequence of darker, clay- and silt-rich beds that mark the base of the Welton Chalk Formation.
		Wood and Mortimore (1995) have interpreted this anomaly as evidence for a basin and swell sedimentary topography in the Chalk of the Lincolnshire Wolds.
		Chalk nodules and laminations occur in the claystone directly beneath a bed of brownish white, nodular limestone which is correlated with Unit 2, the Central Limestone.
	www.fortunecity.com /greenfield/ecolodge/25/Variegat.htm (2665 words)

	Can Flood geology explain thick chalk beds?
		The calcium carbonate content of French chalk varies between 90 and 98%, and the Kansas chalk is 88–98% calcium carbonate (average 94%).
		The two major microorganisms whose remains are thus fossilised in chalk are foraminifera and the spikes and cells of calcareous algæ known as coccoliths and rhabdoliths.
		Indeed, the purity of these thick chalk beds worldwide also testifies to their catastrophic deposition from enormous explosively generated blooms, since during protracted deposition over supposed millions of years it is straining credulity to expect that such purity would be maintained without contaminating events depositing other types of sediments.
	www.answersingenesis.org /tj/v8/i1/chalk.asp (3394 words)

	Southern England Chalk Formation - Wikipedia, the free encyclopedia
		The Chalk Formation of Southern England is a system of chalk downland in the south of England.
		Where the chalk hills meet the sea there are white cliffs such as the White Cliffs of Dover, Seven Sisters and The Needles on the Isle of Wight The chalk would once have extended across the English Channel and similar cliff features can be found on the French coast.
		The Chalk Formation was laid down under the sea during the Upper Cretaceous period, and was later uplifted at around the same time as the Alps were formed.
	en.wikipedia.org /wiki/Southern_England_Chalk_Formation (542 words)

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