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A trough is an elongated region of relatively low atmospheric pressure without a closed isobaric contour that would define it as a low pressure area. Since low pressure implies a low height on a pressure surface, troughs and ridges refer to features in an identical sense as those on a topographic map. Troughs may be at the surface, or aloft, at ...
It is divided into two segments as the ridge is flanked on its eastern side by two southward propagating back-arc basins, the northern Lau Ridge (called historically the South Fiji Ridge [7] and also known as the Fiji Ridge, Neckes Ridge and Southern Fiji Ridge [2]) that forms the western boundary of the Lau Basin and has contributed to many islands south east of Fiji.
Airflow around troughs and ridges in upper troposphere. Given the direction of the winds around an anticyclonic circulation and the fact that weather systems move from west to east: [2] ahead of an upper-ridge, the airflow that comes from the polar regions and brings cold air.
Within the trough is a slowly spreading north–south ridge which may be the result of an offset or gap of approximately 420 kilometres (260 mi) along the main fault trace. The Cayman spreading ridge shows a long-term opening rate of 11–12 mm/yr. [ 4 ] The eastern section of the trough has been named the Gonâve Microplate .
Bering Sea features. Bowers Ridge is in the southern part of the Bering Sea. The Bowers Ridge is located in the southern part of the Aleutian Basin.It extends over 900 km (560 mi) in an arc, starting in the southeast at the Aleutian Arc and terminating to the northwest at the Shirshov Ridge.
Bathymetric image of the Gorda Ridge – GeoMapApp The regional setting of the Gorda Ridge. The Gorda Ridge (or plural, Ridges) (centered 41° 36' N, 127° 22' W), is a tectonic spreading center, located roughly 200 kilometres (120 mi) off the northern coast of California and southern Oregon.
The Trough, photographed on July 3, 2016. The Trough is a 6-mile long wooded gorge carved by the South Branch Potomac River (SBPR) and situated in the Allegheny Mountains of Hampshire and Hardy Counties, West Virginia, US. The area was the site of a 1756 skirmish of the French and Indian War, known as the "Battle of the Trough".
Satellite image of the Cayman Trough Bathymetric features of the Rockall Trough northwest of Scotland and Ireland. In geology, a trough is a linear structural depression that extends laterally over a distance. Although it is less steep than a trench, a trough can be a narrow basin or a geologic rift. These features often form at the rim of ...