What is a glacial trough, and how is it formed? <\/p>\n\n\n\n
How does a hanging valley come about? How is a glacial trough related to a fiord?<\/p>\n\n\n\n
The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n A glacial trough<\/strong> is a U-shaped valley formed by the erosive action of a glacier as it moves through a pre-existing river valley. Unlike rivers that carve V-shaped valleys, glaciers erode the landscape more broadly and deeply due to their immense weight and movement, transforming narrow valleys into wide, flat-bottomed troughs with steep sides.<\/p>\n\n\n\n A hanging valley<\/strong> is a smaller valley that joins the main glacial trough at a higher elevation. It is formed when a smaller tributary glacier joins a larger glacier. The larger glacier, due to its greater erosive power, deepens the main valley more than the tributary glacier can erode its own. After the ice melts, the tributary valley is left “hanging” above the main trough, often resulting in waterfalls.<\/p>\n\n\n\n A glacial trough<\/strong> is related to a fiord (or fjord)<\/strong> in that a fiord is essentially a glacial trough that has been flooded by the sea<\/strong>. After glaciers retreat, the valleys they carved can be inundated by rising sea levels, forming deep, steep-sided inlets typical of coastal Norway, New Zealand, and parts of Canada and Chile.<\/p>\n\n\n\n A glacial trough<\/strong> is a distinctive landform resulting from the movement of glaciers during past ice ages. When a glacier flows through a V-shaped river valley, its immense mass and slow, grinding movement erode the sides and floor of the valley through a process called abrasion<\/strong> and plucking<\/strong>. Over time, this transforms the valley into a U-shaped cross-section<\/strong> with steep, straight sides and a flat bottom\u2014characteristic of glacial troughs.<\/p>\n\n\n\n In the course of glaciation, not all glaciers are of equal size. Smaller tributary glaciers<\/strong> that feed into a larger main glacier do not erode as deeply. After the ice melts, these tributary valleys remain at a higher elevation than the main trough. This results in hanging valleys<\/strong>, which are often marked today by waterfalls<\/strong> cascading into the deeper main valley.<\/p>\n\n\n\n In coastal areas, glacial troughs can extend below current sea levels. When sea levels rise after the glaciers melt, these troughs become flooded, forming fiords<\/strong>\u2014long, narrow, deep inlets of the sea with steep sides, like those in Norway or Alaska. Therefore, a fiord is essentially a submerged glacial trough<\/strong>.<\/p>\n\n\n\n Together, these features\u2014glacial troughs, hanging valleys, and fiords\u2014provide powerful evidence of past glacial activity and help scientists understand how ice has shaped mountainous and coastal landscapes over thousands of years.<\/p>\n","protected":false},"excerpt":{"rendered":" What is a glacial trough, and how is it formed? How does a hanging valley come about? How is a glacial trough related to a fiord? The correct answer and explanation is : A glacial trough is a U-shaped valley formed by the erosive action of a glacier as it moves through a pre-existing river […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-210162","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/210162","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=210162"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/210162\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=210162"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=210162"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=210162"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n\n\n\n300-Word Explanation:<\/h3>\n\n\n\n