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A bedform is a geological feature that develops at the interface of fluid and a moveable bed, the result of bed material being moved by fluid flow. Examples include ripples and dunes on the bed of a river .
Bedford was founded at a ford on the River Great Ouse and is thought to have been the burial place of King Offa of Mercia, who is remembered for building Offa's Dyke on the Welsh border. Bedford Castle was built by Henry I, although it was destroyed in 1224. Bedford was granted borough status in 1166 and has been represented in Parliament since ...
An antidune is a bedform found in fluvial and other channeled environments. Antidunes occur in supercritical flow, meaning that the Froude number is greater than 1.0 or the flow velocity exceeds the wave velocity; this is also known as upper flow regime. In antidunes, sediment is deposited on the upstream (stoss) side and eroded from the ...
Cross-bedded sediments are recognized in the field by the many layers of "foresets", which are the series of layers that form on the downstream or lee side of the bedform (ripple or dune). These foresets are individually differentiable because of small-scale separation between layers of material of different sizes and densities.
The antidune bedform is characterized by shallow foresets, which dip upstream at an angle of about ten degrees that can be up to five meters in length. [3] They can be identified by their low angle foresets. For the most part, antidunes bedforms are destroyed during decreased flow, and therefore cross bedding formed by antidunes will not be ...
The Bedford flag on display at the Bedford Free Public Library is the oldest known surviving intact battle flag in the United States. It is celebrated for having been the first U.S. flag flown during the American Revolutionary War, as it is believed to have been carried by Nathaniel Page's outfit of Minutemen to the Old North Bridge in Concord for the Battle of Concord on April 19, 1775.
Bedford is a town in Hillsborough County, New Hampshire, United States. At the 2020 census , the population was 23,322, [ 3 ] reflecting a growth of 10% from 2010. Bedford is a suburb of Manchester , New Hampshire's largest city.
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