There a dozen giant monitors played their seventy-five-foot jets of water against the huge seam of tertiary gravel which was the mountainside.

The task was a demanding one: the river was fast-flowing, up to deep, and had a bed formed of a deep layer of gravel which made the construction of piers on the river bed impossible, and so the bridge had to have a central span of.

The mountainous districts of England, Wales, and Ireland were also considered to constitute centres for the dispersion of glacial debris ; and Agassiz remarked " that great sheets of ice, resembling those now existing in Greenland, once covered all the countries in which unstratified gravel ( boulder drift ) is found ; that this gravel was in general produced by the trituration of the sheets of ice upon the subjacent surface, etc.

The road network was estimated to be around 31, 200 km in 1999 up from between 23, 000 and 30, 000 km in 1990, of which only 1, 717 kilometers — 7. 5 percent — are paved ; the rest are of dirt, crushed stone, or gravel, and are poorly maintained.

In these roads, the surface was hardened with gravel ; and although pavements were introduced shortly afterwards, the blocks were allowed to rest merely on a bed of small stones.

Into the ditch was dumped large amounts of rubble, gravel and stone, whatever fill was available.

When it came to within 1 yd ( 1 m ) or so of the surface it was covered with gravel and tamped down, a process called pavire, or pavimentare.

As the sea deepened and expanded sand and gravel eroded from mountains in the west was deposited in the Dakota Formation ; later, when the sea was deeper mud and sand were deposited in the Mancos Shale.

He and Lewis hunted for stone-age artifacts in the gravel quarries, Arthur remarking that he was glad the Prussians were not interested in flint artifacts.

The size and form of clasts can be used to determine the velocity and direction of current in the sedimentary environment where the rock was formed ; fine, calcareous mud only settles in quiet water, while gravel and larger clasts are only deposited by rapidly moving water.

Extracting gold from river gravel placers was also popular and a number of sites such as Breckenridge and Fairplay yielded considerable quantities of gold.

The road at the time was a via glarea, a gravel road.

In 1961, Jack Kemsley was able to persuade the Forestry Commission to open their many hundreds of miles of well surfaced and sinuous gravel roads, and the event was transformed into one of the most demanding and popular in the calendar, by 1983 having over of stage.

In the 1960s, the competitions manager of BMC, Stuart Turner, hired a series of brave and gifted young Finns, skills honed on their country's highly competitive gravel or snow rallies, and the modern professional driver was born.

Piltdown Man skull The skull unearthed in 1908 was the only find discovered in situ, with most of the other pieces found in the gravel pits ' spoil heaps.

In 2000, output for sand and gravel was 214, 700 tons, up from 50, 389 in 1996 ; crushed stone output was 121, 226 tons.

Pumice was the major commodity extracted from the island for export, and Dominica produced clay, limestone, volcanic ash, and sand and gravel, primarily for the construction industry.

Until the 13th century, the direct route to the sea at Highbridge was prevented by gravel banks and peat near Westhay.

Silt can smother the spawning beds of fish, by filling in the space between gravel on the stream bed.

Indeed, plants growing in a typical traditional gravel filter bed, with water circulated using electric powerhead pumps, are in effect being grown using gravel hydroponics.

Sections of the Missouri River floodplain taken by the United States Geological Survey show a great variety of material of varying coarseness, the stream bed having been scoured at one place and filled at another by currents and floods of varying swiftness, so that sometimes the deposits are of coarse gravel, sometimes of fine sand or of fine silt.

The cathedral is built on a gravel bed with unusually shallow foundations of upon wooden faggots: the site is supposed to have been selected by shooting an arrow from Old Sarum, although this can only be legend as the distance is over.

Foresthill is located on a broad ridge between the North and Middle Forks of the American River on the gold-bearing gravel bed of an ancient river.

The Illinois Valley's largest gold rush town, Waldo, Oregon, was located on a gravel deposit and was eventually destroyed when its gravel bed was run through a sluice box, along with most of the town.

This generous gravel walking path ( former railway bed ) has a gentle grade that is suitable for almost all horseback riders, hikers, walkers and bikers.

The name is derived from popel ( pebble ) and tun ( hamlet, farm ), and means " Pebble Farm ", due to the gravel bed upon which the village was built.

The name is derived from popel ( pebble ) and tun ( hamlet, farm ) and means " Pebble Farm " because of the gravel bed upon which the village was built.

The helmet was found in what appears to have been a carefully arranged deposition in a bed of gravel, distant from any known Roman sites.

* Bench gravel: a bed of gravel located on the side of a valley above the present stream bottom, indicating the former location of the stream bed when it was at a higher level.

It drew water from a reservoir trapped in a bed of shale sand and gravel, which would explain the unusually cool temperature of the water.

In this last stretch the gravel deposits in the river bed and along the banks are rich with diamonds, and several diamond mines operate along the stretch pictured here.

In Gardner Canyon one can see the old, sorted gravel bed of the Gardner River covered by unsorted glacial till .</ onlyinclude >

In 1926, the first municipal airport in Boise was built on a gravel bed where the Boise State University campus now stands.

When the crews reached the compacted gravel bed of the Ohio River, Roebling decided this would be sufficient for the foundation of the Cincinnati tower.

Between 250 to 300 million years ago, freshwater streams flowing from ancient mountains brought silt, sand and gravel into what is now the Gulf of St. Lawrence.

The boy later in life found a mammoth's tooth in a gravel pit near an ancient long barrow on the Broome Heath.

At the bottom of the Thorp Drift moraine the view opens up into the Kittitas Valley which is deeply buried in river gravel deposited by the ancient Yakima River.

By extension, placer mining refers to mining the precious metal deposits ( particularly gold and gemstones ) found in alluvial deposits — deposits of sand and gravel in modern or ancient stream beds, or occasionally glacial deposits.

However, a few believe that the name came from the ancient Germanic word " gries ", meaning " gravel " or " stone ".

He one garden with five artificial hills covered with grass, symbolizing the five great ancient temples of Kyoto ; a modern rock garden, with vertical rocks, symbolizing Mount Horai ; a large " sea " of white gravel raked in a checkboard pattern ; and an intimate garden with swirling sand patterns.

Sir Joseph Prestwich FRS, ( 12 March 1812 – 23 June 1896 ) was a British geologist and businessman, known as an expert on the Tertiary Period and for having confirmed the findings of Boucher de Perthes of ancient flint tools in the Somme valley gravel beds.

The modern gravel road goes more or less parallel and a bit south-east of the ancient horse trail.

In ancient Japan, sand ( suna ) and gravel ( jari ) were used around Shinto shrines and Buddhist temples.

Searle's Farm is an ancient Tudor building now in the middle of the gravel pits.

It was developed on relatively thin layers of deposited clay and gravel in the central part of a dried ancient lake known as the Nagdaha.