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the rising air helps create clouds which can lead to precipitation. Study with Quizlet and memorize flashcards containing terms like what is a ridge, what is a trough, - what kind of weather is associated with a ridge - explain why and more.
A trough is an elongated area of relatively low pressure extending from the center of a region of low pressure. You mark low with a red L, high with a blue H, ridge with a squiggle line, trough with a dotted line. Determine wind speed from a map with isobars.
Spurs from pre-glacial valley gradually eroded by glacier - ice is not able to move as freely round obstacles as water. Study with Quizlet and memorise flashcards containing terms like Compared to a river valley, Characteristics, Ribbon lakes and others.
Aug 9, 2024 · Learn about the formation of glacial landforms from corries to troughs, along with examiner tips and worked examples for the AQA GCSE Geography exam.
- Troughs and Fjord Formation
- Fjords
- Markers of Past Environments
The formation of such landforms occur over long geological timescales, from 10,000 years to over 100,000 years, and across multiple different glaciations . Troughs are also referred to as U-Shaped Valleys due to their parabolic shape with very steep sides, and flat bases . Their formation occurs through a combination of erosional processes includin...
At the previous terminal position of the glacier, where erosion is lower, and sediment can be deposited, a formation known as a glacial sill, submarine ridge or morainal shoalmay form. This forms a barrier between the mouth of a fjord and the fjord valley. As sea levels rise over time due to tectonic activity and glacial melt, the valley begins to ...
Not only do troughs and fjords act as evidence for past glaciation, they can also contain clues about past glacial processes, and responses to change . Examples of this includes scour marks or striations on the trough floor due to the entrainment and transport of plucked material at the base of a glacier [3,5]. Mega scale glacial lineations (MSGL)o...
Study with Quizlet and memorise flashcards containing terms like What is an ecosystem?, What does the term 'biotic' mean?, What does the term 'abiotic' mean? and others.
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Why are troughs called U-shaped valleys?
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 tectonic plates. There are various oceanic troughs on the ocean floors.
