Dürer journeyed with his wife and her maid via the Rhine to Cologne and then to Antwerp, where he was well received and produced numerous drawings in silverpoint, chalk and charcoal.

Spending much of his youth on Bear Island, in Penobscot Bay off the coast of Maine, he had trouble with geometry, being unable to understand the abstraction necessary to imagine that a chalk dot on the blackboard represented a mathematical point, or that an imperfectly drawn line with an arrow on the end was meant to stretch off to infinity.

The Cretaceous as a separate period was first defined by a Belgian geologist Jean d ' Omalius d ' Halloy in 1822, using strata in the Paris Basin and named for the extensive beds of chalk ( calcium carbonate deposited by the shells of marine invertebrates, principally coccoliths ), found in the upper Cretaceous of western Europe.

The name Cretaceous was derived from Latin creta, meaning chalk.

The Cretaceous was named for the extensive chalk deposits of this age in Europe, but in many parts of the world, the Cretaceous system consists for a major part of marine limestone, a rock type that is formed under warm, shallow marine circumstances.

After the end of the First World War, a chalk quarry known as the Swamps was identified as Charlton's new ground, and in the summer of 1919 work began to create the level playing area and remove debris from the site.

Experimenting with different lines until he was satisfied, Eric would then form the steel tubing using his chalk drawings as a guide.

In ancient times graffiti was carved on walls with a sharp object, although sometimes chalk or coal were used.

One product, now largely defunct, was water-cress, based in Hemel Hempstead and Berkhamsted supported by reliable, clean chalk rivers.

Although this offered great opportunities, he recalls in his autobiography that the only equipment provided to him was a blackboard and piece of chalk.

On 7 December 2007, Michelangelo's red chalk sketch for the dome of St Peter's Basilica, his last before his death in 1564, was discovered in the Vatican archives.

These chalk beds were deposited at the bottom of what was once the Western Interior Seaway, a large shallow sea over what now is the midsection of the North American continent.

The first permanent photograph was made in 1822 by a French inventor, Joseph Nicéphore Niépce, building on a discovery by Johann Heinrich Schultz ( 1724 ): that a silver and chalk mixture darkens under exposure to light.

At some period after its arrival in London, the inscriptions on the stone were coloured in white chalk to make them more legible, and the remaining surface was covered with a layer of carnauba wax designed to protect the Rosetta Stone from visitors ' fingers.

He had his guards supplied with link lights and had chalk and cinders strewed around his tent outside Masyaf — which he was besieging — to detect any footsteps by the Assassins.

The chalk dug from the ditch was piled up to form the bank.

During the millennium celebrations in 2000, the Sydney Harbour Bridge was lit up with the word " Eternity ", as a tribute to the legacy of Arthur Stace a Sydney artist who for many years inscribed that word on pavements in chalk in beautiful copperplate writing despite the fact that he was illiterate.

The Triassic was named in 1834 by Friedrich Von Alberti, after the three distinct rock layers ( tri meaning " three ") that are found throughout Germany and northwestern Europe — red beds, capped by chalk, followed by black shales — called the ' Trias.

The term in Latin equates to the English " blank slate " ( or more accurately, " scraped tablet ") ( which refers to writing on a slate sheet in chalk ) but comes from the Roman tabula or wax tablet, used for notes, which was blanked by heating the wax and then smoothing it to give a tabula rasa.

Individual hybrids of rhododendrons have been grafted on to a rootstock on a single rhododendron plant that was found growing in a chalk quarry.

It was obvious from this viewpoint that the proximity of friendly forces to the enemy positions was preventing sufficient suppressive firepower from being used due to danger close distance to both Mako 30 and QRF chalk 1.

The estuary of the Solent River was gradually flooded, and eventually the Isle of Wight became separated from the mainland as the chalk ridge between The Needles on the island and Old Harry Rocks on the mainland was eroded.

The Cretaceous is justly famous for its chalk ; indeed, more chalk formed in the Cretaceous than in any other period in the Phanerozoic.

" Nitzana Chalk curves " situated at Western Negev, Israel are chalk deposits formed at the Mesozoic era's Tethys Ocean

* Sidewalk chalk is similar to blackboard chalk, except that it is formed into larger sticks and often colored.

The ridge is formed of oceanic sedimentary rock from the Late Cretaceous, and contains a soft chalk and a hard flint.

The Uffington White Horse is a highly stylized prehistoric hill figure, 110 m long ( 374 feet ), formed from deep trenches filled with crushed white chalk.

Chert occurs as oval to irregular nodules in greensand, limestone, chalk, and dolostone formations as a replacement mineral, where it is formed as a result of some type of diagenesis.

It is found in chalk or marly limestone formations and is formed by a replacement of calcium carbonate with silica.

Downland is formed when chalk formations are raised above the surrounding rocks.

Galium verum ( L .) Lady's Bedstraw, a typical English chalk downland plant. In temperate regions chalk downland is typically calcareous grassland, a habitat formed by grazing from both livestock and wild animals.

The chalk was formed in the Late Cretaceous period, between 65 and 100 million years ago, when the area was under the sea.

When the last Ice Age ended, sea levels rose and the English Channel formed, cutting into the chalk to form the dramatic cliffs along the Sussex coast.

It lies at the confluence of four dry valleys formed by the meltwater at the end of the last ice age which deposited onto the bed rock of chalk, alluvial gravels, silts, on which the town now sits.

Geologically speaking, the whole area was originally under water, and, when the land rose, the chalk Wolds were formed from the skeletons and shells covering the sea floor.

From the fossils contained in the three distinct layers — of red bed sandstones, capped by chalk ( Muschelkalk ), followed by black shales — that are found throughout Germany and Northwest Europe, and are called the ' Trias ' ( Latin trias meaning triad ), Alberti detected that they formed a single stratigraphic formation ; today it would be termed a system.

It is part of a system of chalk downlands throughout eastern and southern England formed by the rocks of the Chalk Group and largely lies within the county of Wiltshire, with a little in Hampshire.

The Chilterns are part of a system of chalk downlands throughout eastern and southern England, formed between 65 and 95 million years ago, and comprising rocks of the Chalk Group and which also includes Salisbury Plain, Cranborne Chase, the Isle of Wight and the South Downs, in the south.

The northern headland of the bay is formed of chalk, the southern of Purbeck Limestone, with softer primarily Wealden clays forming the bay and valley in which the town is sited.

The South Downs are formed from a thick band of chalk which was deposited during the Cretaceous Period around sixty million years ago within a shallow sea which extended across much of northwest Europe.

The site of modern Étaples lies on the ridge of dunes which once lay to seaward of a marsh formed off-shore from the chalk plateau of Artois.

The chalk here forms part of a system of chalk downlands in southern England, and once formed a continuous ridge between what is now west Dorset and the present day Isle of Wight.