Boulder

In geology, a boulder is a rock fragment with size greater than 25.6 centimetres (10.1 in) in diameter. Smaller pieces are called cobbles and pebbles, depending on their "grain size". While a boulder may be small enough to move or roll manually, others are extremely massive. In common usage, a boulder is too large for a person to move. Smaller boulders are usually just called rocks or stones. The word boulder is short for boulder stone, from Middle English bulderston or Swedish bullersten.

In places covered by ice sheets during Ice Ages, such as Scandinavia, northern North America, and Russia, glacial erratics are common. Erratics are boulders picked up by the ice sheet during its advance, and deposited during its retreat. They are called "erratic" because they typically are of a different rock type than the bedrock on which they are deposited. One of them is used as the pedestal of the Bronze Horseman in Saint Petersburg, Russia.

Some noted rock formations involve giant boulders exposed by erosion, such as the Devil's Marbles in Australia's Northern Territory, the Horeke basalts in New Zealand, where an entire valley contains only boulders, and The Baths on the island of Virgin Gorda in the British Virgin Islands.

Shoreditch Park

Shoreditch Park is an open space in Hoxton, in the London Borough of Hackney. It is bounded by Poole Street (to the north), Rushton and Mintern Streets (south) and New North Road (west) and Pitfield Street (east). The park derives its name from the Metropolitan Borough of Shoreditch, the local authority when it was established. The park is 7.7 hectares (19 acres) in extent.

The park was originally created in the 1970s on an area of terraced housing that had been devastated by the Blitz, and then used for temporary housing, known as prefabs. In 2005 and 2006, an extensive excavation was carried out by archaeologists from the Museum of London to commemorate the 60th anniversary of the end of World War II. The excavation examined housing of the time, and investigated the damage caused by aerial bombing and missiles. It was pioneering in involving members of the local community in the project.

The park has sports facilities, an adventure playground, children's playground, London's only outdoor beach volleyball court (managed by London Beach Volleyball Club. Recent improvements include innovative low energy LED lighting, the creation of an outdoor amphitheatre in the park for theatre and cinema screenings; and an 85-tonne granite boulder by the artist John Frankland. The Britannia Leisure Centre is adjacent to the park, on its north eastern boundary.

Boulder (disambiguation)

A boulder is a large rock.

Boulder may also refer to:

Places

Education

Other uses

See also