glacier action in geography

Posted on November 7, 2022 by

Although sadly, they're not edible! During the Ice Ages, glaciers covered as much as 30 percent of Earth. Iwena, Pages 63-65. It is a framework in a robust equilibrium where the mass parity relies upon input and output. Glacier National Park is an American national park located in northwestern Montana, on the Canada-United States border, adjacent to the Canadian provinces of Alberta and British Columbia.The park encompasses more than 1 million acres (4,000 km 2) and includes parts of two mountain ranges (sub-ranges of the Rocky Mountains), more than 130 named lakes, more than 1,000 different species of . If you haven't already done it work through the 'Glacial erosion' web unit to learn more. Wrap up warm, gang, and join us here at Nat Geo Kidsas we check out ten brrr-illiant facts about glaciers! Glaciation: is the modification of the land surface by the action of glaciers. Therefore, glacier ice is the second largest reservoir Glaciers exist on every continent except Australia. You can choose which ones we send by selecting 'Manage Cookies', below. -snow that is in the process of becoming glacial ice. thanks for help on geography project!!!!! Aretes, or steep-sided ridges, are formed by two glaciers eroding opposite sides of a ridge. Glaciation is the study of ice and its impact on the environment. LOVE IT. Erosional landforms can be created in two waysby scouring or plucking. Get messy, explore and appreciate nature, all from the safety of home! I would tell ANYONE to join. So the mean ELA for a 30-year period of record is a parameter as is End moraine forms at the terminal of the glacier. GLACIAL MOVEMENT. Pettit observes and measures the flow, fracture, and retreat of glaciers. End moraine and ground moraine are common in both Alpine glaciers and ice sheet. Glaciations have occurred so recently in N. America and Europe, that weathering, mass wasting, and stream erosion have not had time to alter the landscape. According to the Oxford Learner Dictionary, glacier means, a large mass of ice, formed by snow on mountains, that moves very slowly down a valley., According to the Cambridge Dictionary, glacier means a large, CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. moraines are basically ridges of till, there are four main types of moraines. Engage engage students on the cause and consequences of their formation and the significance of their study to mankind . A .gov website belongs to an official government organization in the United States. About three-quarters of Earth's freshwater is stored in glaciers. Animals found here such as bear, snow leopard, wolverine, etc. The monitoring program of the U.S. Geological Survey employs a nested approach whereby an intensively studied glacier is surrounded by le, Hubbard Glacier, the largest calving glacier on the North American Continent (25 percent larger than Rhode Island), advanced across the entrance to 35-mile-long Russell Fiord during June 2002, temporarily turning it into a lake. It often contains a waterfall. The Vatnajkul Glacier (Vatna) in Iceland is located in the island's southeast.Its coordinates are 64.24 N 16.48 W. Vatnajkul Glacier is the biggest, highest, oldest, and thickest glacier in Iceland. Share sensitive information only on official, secure websites. Glaciation: It is the wearing away of the earth surface by a glacier. Areas with large glacial sheets include Antarctica and GREENLAND. Would rate 10/10. Bona and Mt. A glacier is a large, perennial accumulation of crystalline ice, snow, rock, sediment, and often liquid water that originates on land and moves down slope under the influence of its own weight and gravity. Natural cavity on weak rocks formed by the action of waves. It really helped me with my homework :) Thank you NG! Question 1. These are restricted to mountain plateaus and are smaller ice sheets. 14 of 27 Ice Field, Alaska A terminal moraine marks the furthest extent to which the glacier advanced and is found at the lowest elevation. You will receive our UK newsletter. 97.2% is in the oceans and inland seas 2.1% is in glaciers 0.6% is in groundwater and soil moisture less than 1% is in the atmosphere less than 1% is in lakes and rivers less than 1% is in all living plants and animals. How long can we expect the present Interglacial period to last? The glacier pushes material up the sides of the valley at about the same time, so lateral moraines usually have similar heights. Also I like the little voting thing on the side to see which pet you would want, little bit of fun while learning! ; Corrie, Cirque or cwm. 2. Thus, in this article, we have covered one important landform i.e. These are dense and huge mass of ice sheets that move very slowly and are a great source of freshwater and maintains the global temperature of the planet. The weight of the snow compresses the lowest layers, changing the snow to ice. These glaciers look like mountains or peaks and also termed sometimes as mount glacier or glacier mountain. The exact composition of any particular till, however, depends on the materials available to the glacier at the time of deposition. At 76 kilometers, the Siachen Glacier is Karakoram Range's longest glacier and the world's second-longest non-polar glacier.The glacier lies to the east of the main Karakoram Range and west of the Saltoro Ridge, falling from an elevation of 5,753m at its head in Indira Col to 3,620m at the terminating point. Tours and Tour Guides for Vatnajokull Glacier in Iceland can be booked year-round. The first that we will talk about is plucking, which is defined as the erosion and transport of large chunks of rocks. In this, we will learn about the meaning or definition of the glacier, their distribution, benefits, and other related concepts. Brrrr! xx, Thanks, really helped with my assessment. Even though many people think it is great, I dont think so. Most glaciers today are remnants of the massive ice sheets that covered Earth during the Ice Age. Hubbard Glacier has been advancing for more than 100 years and has twice closed the entrance to Russell Fiord during the last 16 years by squeezing and pushing submarine g, One way to study Earths past environmental conditions is to look at ice cores recovered from glaciers. Geography Paper 1 Landforms 2014 - Explain the concept of fluvial cycle, and the sequential development of landforms. There are quite a few interactive glacier models on the internet that you can play with. thx so much for your help! The Ice Age ended more than 10,000 years ago. How much of the Earth's water is stored in glaciers? Scientists believe we may be living in an interglacial interval within an Ice Age. Valley glaciers normally flow at rates of a few inches to 7 feet (0.1 to 2 meters) per day. If a media asset is downloadable, a download button appears in the corner of the media viewer. Plucking removes material from the surface of the earth. A hanging valley forms when a small tributary glacier erodes a valley so the elevation of the valley floor is higher than that of the valley of the main river of ice. I love getting the national geographic kids magazines too because they are really interesting!, Thanks, really help with my Geography assessment. 1) Glaciers are huge masses of ice that flow like very slow rivers. If the temperature reaches up to the pressure melting point, it can lead to glacier erosion. ddddddddddddduuuuuuuuuuuuuuuuuuuuddddddddddddddaaaaaaaaaaaaaaaaaa, jamieeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee, COOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOL. 10) Glacial ice can be hundreds of thousands of years old, which makes it a valuable resource for assessing climate change. Ice caps are miniature ice sheets in polar and subpolar regions. The glaciers found in tropical regions are called tropical glaciers and those found in temperate regions are called temperate glaciers. The central part of a valley glacier moves faster than the sides, as happens in a stream of water. Most glacier ice forms through the metamorphism of tens of thousands of individual snowflakes into crystals of glacier ice. During the last ice age they covered 32%. i will use it at home so i can write a report on glaciers hahahahahaha, We need to reduce CO2 use to save these glaciers, this is very helpful since we have to write an essay, ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooollllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll, I want more info and facts plz!! 4) Glaciers are usually divided into two groups Alpine glaciers, which form on mountainsides and move downward through valleys, and Continental ice sheets, which spread out and cover larger areas. Yes and no. Learn more: USGS Water Science School - Glaciers: Things to Know. Mechanisms 4. Between 1979 and 1981, optimum satellite images were distributed to a team of 70 scientists, representing 25 nations and 45 institutions, who agreed to author sections of the Professional Paper concerning either a geographic area (chapters B-K) or a glaciologica, Glaciers are important features in the hydrologic cycle and affect the volume, variability, and water quality of runoff. * Degradation in geography and geology is the process of the lowering of a fluvial surface, i.e. Glaciers are classified by their size (i.e. They can cause erosional landforms or depositional landforms. For example, there are a lot of such ice shelves in Greenland and Ellesmere Island. They maintain the ecological balance of the planet. Glaciers are large, thick masses of ice that form on land when fallen snow gets compressed into ice over many centuries. Hydraulic action is when the force of fast-flowing water hits the bed and banks and forces water and air into cracks in the bedrock. great website i will now know to look here for info! As glaciers move over the land, they pick up . Thank you.The web site helped me a lot with my home work. A lateral moraine is built up along the sides of an alpine glacier. The Rights Holder for media is the person or group credited. If all the world's glaciers suddenly melted, there would be catastrophic results. Discuss the action of glacier as an agent of erosion and deposition and the resulting landforms. Mendenhall Glacier in Alaska is a type of mountain glacier as well as a temperate glacier which also consists of a glacial lake and glacial caves. Contrary to stories and songs, they do not give glacier ice its blue color and they don't grow to lengths of 50 feet. Contemporary fluvioglacial landscapes are found in areas where glaciers . Lesson plans, puzzles, exam technique and revision to support your teaching of glaciation in geography. The glacier forms in a cirquea high rock basin in which snow accumulates for year after year until it forms a glacier. Glacial deposition is the settling of sediments left behind by a moving glacier. A glacier is charged with rock debris which are used for erosional activity by moving ice. Many of the world's largest seaports would be underwater. this website is sooo helpful at school. The most widespread features of glacier deposition are moraines. -first compresses into firn (small pellets) Scientists are more interested in total glacial land coverage as a measure. thank you this was very helpful to my homework. You're leaving our kids' pages to visit a page for grown-ups! The repeated changes in air pressure cause the river bed to weaken. A glacier is a moving mass of ice, air, water, rock and sediment. Question 2. A glacier is a moving mass of ice, air, water, rock and sediment. Florida would consist of a few tiny islands. What are the 7 Continents and their Countries? Pictures Show Climate Change's Dramatic Arctic Impact. The floating parts of ice sheets are known as ice shelves. ACTION OF GLACIER EROSION. If the entire glaciers or ice sheets of Antarctica melts then the sea level will almost rise by 65m which means London will be submerged underwater along with several other similar places. Assessing and predicting the effect of glaciers on water resources require a monitoring program to provide basic data for this understanding. Once again many thanks. 5) The worlds largest glacier is Lambert Glacier, located in Antarctica, measuring approximately 100km wide, 400km long and 2.5km deep! There are several types of glaciers. The action of glacier is an important agent of erosion, transportation and deposition in temperate regions or mountainous regions. Tundra and alpine vegetation are found in temperate regions. Its surface is 7.900 square kilometers and covers around 8% of the country's total area. It is an accumulation of materials deposited by glaciers. A glacier model is a simple way of describing a glacier or ice sheet, using well-understood mathematical relationships, such as the deformation rate, amount of melting, snowfall and precipitation. Large body of seawater. They are deep, long and wide troughs or basins with very steep concave to vertically dropping high walls at its head as well as sides. hundreds of miles long, tens of miles wide. A medial moraine can form where two glaciers flow together. Glaciers act as reservoirs of water that persist through summer. This is consistent with what is seen in the Vostok ice core from Antarctica and several records of sea level high stands. The glacier mountain finds in the tropical regions are known as tropical glaciers. 3 and different in another case. When a glacier retreats, it does not move backward. Subglacial melt out till: often develops within cavities. Moraines usually contain all sizes of particles, ranging from large boulders to fine silt. In this Landsat EarthView, one glacier in Chile bucks the global trend: ANCHORAGE, Alaska This year marks the 50th anniversary of one of the longest continuous glacier research efforts in North America. Types [] This ice-free corridor also provided one route for humans to move into North America. If there is more accumulation than melting, a glacier will form. What is hydraulic action? 2014- What is a glacier? Meaning of Periglacial: The term periglacial literally means around the ice or peripheral to the margins of the glaciers but now this term is used for both 'periglacial landscape' and 'periglacial climate'. As the glacier begins to recede, the layer of till is laid down, forming . A glacier during its lifetime creates various landforms which may be classified into erosional and depositional landforms. For example, Lower Curtis glacier in Washington. Such conditions occur beneath thin cirque or valley glaciers, or near the margins of ice sheets 3,4,10. Glaciers are a bulk of ice moving under its weight. National Geographic Headquarters 1145 17th Street NW Washington, DC 20036, National Geographic Society is a 501 (c)(3) organization. The action of glacier is more dominant in (a) humid region (b) tropical region (c) temperate region (d) desert region; During the past century, the terminus of the glacier has retreated nearly 5 kilometers to its present location (fig. It is an important geographical term for students preparing for the IAS Exam or any other Government Exam.. Geography is a significant part of the General Studies Paper-1 in the UPSC Syllabus.. Students choosing their Optional Subject as Geography for UPSC Mains Exam can also find this article useful. Essay # 1. For example, the Fox glacier in Newzealand or Mendenhall glacier in Alaska are considered temperate glaciers. -typically happens farther away from the equator and at higher altitudes. Meaning of Glacier: ADVERTISEMENTS: In the Arctic regions it is difficult to see the effects of a covering of snow and ice on the rocks below; but in the Alpine regions it is easy, for their, there has been for some time to retreat of the ice, and so in summer-time one can see what has been its . Most glaciation has occurred during an Ice Age. A glacier always moves in the same direction. 2012- Present glaciated morphology through various stages. About 20 thousand years ago, the last in a series of glaciers moved across North America like a pancake spreading on a griddle. Glaciers are massive bodies of slowly moving ice. Large bodies of ice, called glaciers, flowed slowly from upland . Glaciers and the landscapes they have shaped provide . They are simply a bowl-shaped depression formed due to the erosional activity of glaciers. Other areas, such as valley glaciers of the Antarctic Peninsula and glaciers of the Transantarctic Mountains may date from the early Pleistocene. The mineral ice is the crystalline form of water (H2O). Essential Geography, O.A. That is why it looks more precarious for climbers than it really is, although the conditions are still hazardous. Image credit: Danokhan/Wikimedia Commons. cool stuff like the largest glacier!!!!!!! How many glaciers currently exist in Alaska? Owing to the force applied by the weight of the ice, the glaciers move very slowly almost 2 cm per day. SAPPING: Sapping is the breaking up of rocks of alternate freezing and thawing of water at the bottom of cracks between a mass of ice and the sides and floor of a valley or the sides of a mountain. According to the Oxford Learner Dictionary, glacier means a large mass of ice, formed by snow on mountains, that moves very slowly down a valley., According to the Cambridge Dictionary, glacier means a large mass of ice that moves slowly., Glaciers can be majorly divided into two classifications based on geographic locations such as. Approximate distribution is:91% in Antarctica8% in GreenlandLess than 0.5% in North America (about 0.1% in Alaska)0.2% in AsiaLess than 0.1% are in South America, Europe, Africa, New Zealand, and Indonesia. Answer. Exact limits for the terms large, perennial, and flow cannot be set. They exist where the average annual temperature is closer to the freezing point and precipitation in . Glaciers flow very slowly with gravity created by their own mass. The divides between Cirque side walls or head walls get narrow because of progressive erosion and turn into serrated or saw-toothed ridges referred to as aretes with very sharp crest and . In this article, we will be talking about this landform. Supra . Vatnajokull Glacier is located in the southeast of Iceland with coordinates 64.4220 N, 16.7902 W. 5) The world's largest glacier is Lambert Glacier, located in Antarctica, measuring approximately 100km wide, 400km long and 2.5km deep! thank you, This website left me with some awesome facts. Some places were under 3km of ice. For Greenland, ice cores and related data suggest that all of southern Greenland and Based on the most recent comprehensive survey in 2011, there were about 27,000 glaciers in Alaska. Parts of the Antarctic Continent have had continuous glacier cover for perhaps as long as 20 million years. Within Glacier Bay National Park in southeastern Alaska, the Fairweather Fault represents the onshore boundary between two of Earths constantly moving tectonic plates: the North American Plate and the Yakutat microplate. Every year a layer of snow accumulates on glaciers, like a page in a history book, and eventually turns to ice. Snow-Line: It is the lower limit of snow cover on a mountain. It started out as a school assignment and then, it was just the best. We have seen its various benefits and have learned what will happen to Earth if glaciers melt. The vitality driving this framework is the vitality that drives the movement of the . Join us in The People v. Climate . Other Types of Glacier Mountain are Classified as Under: These are massive thick glaciers that covered most of the planet during the ice age. These are formed inside or near the mountains in a bowl-like depression. Climatic changes bring about an Ice Age, when temperatures become cooler. A glacier is a huge mass of ice that moves slowly over land. Which mountain in the conterminous U.S. has the most glaciers? Formation of a Glacier (causes) -the result of accumulation being greater than ablation. Typically, glaciers exist and may even form in areas where: winter precipitation produces significant accumulations of snow. This is a very educational website.Really cool and awesome! These cookies allow us to target other information on our website, like advertising, towards your interests. Secure .gov websites use HTTPS In fact, they store 75% of the worlds fresh water! Indeed, glaciers worldwide have been shrinkingand even disappearingat an accelerated rate for the past several decades.Among the scientists studying the changes in glaciers is Erin Christine Pettit, a glaciologist at the University of Alaska Fairbanks. It is usually located at a higher elevation. The downslope movement of a glacier from its snow-covered valley head & the the intensive shattering of the upland slopes, tend to produce a depression where neve or firn accumulates. Glacier peak or mount glacier also serve as tourist attractions and a source of great revenue for the state. A glacier (US: / l e r /; UK: / l s i r, l e s i r /) is a persistent body of dense ice that is constantly moving under its own weight.A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries.It acquires distinguishing features, such as crevasses and seracs, as it slowly flows and deforms under stresses induced by . Temperature Inversion - Types, Conditions, Effects and FAQs, Jet Stream - Layers, Formation, Types, Facts and FAQs, Forest Fire - Types, Effects, Natural Disaster and Management, Fly Ash - Concrete, Bricks, Sources, Relation and Facts, Rivers - Origin, History, Formation and Uses, Typhoon - Formation, Structure, Differences and FAQs. During that time the northern and eastern parts of the British Isles were covered in ice. Attrition: This refers to a type of erosion occurring at the coasts, glaciers, or rivers. It is a body of dense ice that moves slowly. It contains more than five times the glacier area of all the other Cascade volcanoes combined. Yes, ice worms do, in fact, exist! For example, glaciers present in India and Pakistan which are tropical countries. Glaciers form when snow builds up over a period of many years. Piedmont glaciers happen when valley glaciers spill over onto flat plains and spread out. Thanks for the facts, You helped me so much with my science report thanks, This is a very good documentary/facts for kids even for teenagers like me im 13 so well done national geographic kids because you helped me do my homework thank you .so keep going with your good work!!! The Andes Mountain range in South America contains some of the worlds largest tropical glaciers. Ice shelves extend over the sea and surround the entire continent of ANTARCTICA. If you have questions about licensing content on this page, please contact ngimagecollection@natgeo.com for more information and to obtain a license. This is why. Antarctica and Greenland combined hold more than 99% of the glaciers of the Earth. Glacier flow moves newly formed ice through the entire length of a typical Alaskan valley glacier in 100 No--most of interior Alaska, south of the Brooks Range and north of the Alaska Range, was a non-glaciated grassland refuge habitat for a number of plant and animal species during the maximum Pleistocene glaciation. This combination of 14 September 1986 (left) and 1 August 2019 photos provided by Nasa show the shrinking of the Okjkull glacier on the Ok volcano in west-central Iceland. Omg best website ever dont u think anaise and write your name !!! Features of Periglacial 3. Time s@ving.didnt need to scourge the internet for geography facts.THANK U NG, I ACTUALLY CANT BELIEVE THIS WEBSITE SO GOOD AMAZING JUST OMG I CANT GET OVER IT. Love this website it is so good for homework love tell friends about this website bet them if they like it they give u something and if they hate it u give them something I am sure they will love it, This website was really helpful for my homework and I got top marks so yay! A moraine is an example of a depositional landform. An example includes rivers becoming deeper by sediment being eroded away from . 2) Glaciers form the largest reservoir of fresh water on the planet. Glaciers form on land, and they are made up of fallen snow that gets compressed into ice over many centuries. It has more effect when there is loose material on the surface. These notes will help the students of Class 8 as well as the students of higher classes. When a glacier retreats, hill-shaped deposits known as drumlins occur. Glaciers are masses of snow that has been compressed into giant sheets of ice. They are usually found high on mountainsides. What are the impacts of glacier loss, other than losing an aesthetic landscape feature? Stress produced by a glacier's movement causes cracks called crevasses. Mount Rainier has approximately 26 glaciers. This movement of the chunks of packed ice causes erosion on the land underlying the glacier. Plucking: It is the tearing away of blocks of rocks which have become frozen on the sides or . 13. Striations, also known as glacial grooves, are deep scratches carved into the surface of the rock. ACTION OF GLACIER EROSION. Continual melt from glaciers contributes water to the ecosystem throughout dry months, creating perennial stream habitat and a water source for plants and animals. A geological map from. 8) Earths two ice sheets cover most of Greenland and Antarctica and make up more than 99% of the worlds glacial ice. The status of the Vatnajokull Glacier is retreating, and now its area is 3050.2 . When a glacier melts it deposits the sediment it eroded from the land. Chicken outt, my class learnt so much from this website, this site helped me so much, very helpful and extremly factual. They fill the valley, often flowing to the sea. Let us have a look at the FAQs. The amount of area glaciers occupy in Alaska is trending downward Mount Rainier, Washington, at 14,410 feet (4,393 meters), the highest peak in the Cascade Range, is a dormant volcano whose glacier ice cover exceeds that of any other mountain in the conterminous United States. Glaciers also slowly flow over the land. Glaciologists began studying glaciers during the 19th century in order to look for clues about past ice ages. its cool but when i,m trying to do something for school and it is a lot of big words, hey its me the lion I love this website it gives me the most information. Many aquatic species in mountainous environments require cold water temperatures to survive. They form over hundreds of years where fallen snow compresses and turns into ice. thx, great info for my geography project. In the past, glaciers have covered more than one third of Earth's surface, and they continue to flow and to shape features in many places. Sapping: This is the braking up of rock by alternate freezing and thawing of water at the bottom of cracks. Lodgement till: lodged by the ice onto the substrate. Glaciers are vast areas of ice that have been formed owing to many years of snowfall that has compacted. when snow accumulation is greater than snow loss. 13,000 years (peak in 23,000 years) mountain glaciers, valley glaciers and alpine glaciers. 9) If climate change caused the Antarctic ice sheet to melt entirely, it is estimated that sea levels would rise by around 65m. it really helped I knew tones more than half an hour ago Amazing x100 , really useful stuff, and the pictures are gorgeous! The action of glacier is carried out in the following ways: Sapping: It is the breaking up of rocks of alternate freezing and thawing of water at the bottom of cracks between a mass of ice and ides and floor of a valley or the sides of a mountain. We have read about the glacier and its related concepts. Mostly due to avalanches, the ice or snow accumulation occurs here from the surrounding slopes. Aretes: Arete is a narrow ridge of rock which separates two valleys. She or he will best know the preferred format. Debris is created by erosion in certain areas, entrained and moved by ice and water, and stored in different areas. Most glaciers were formed during the last ice age. An official website of the United States government. This also means that roches moutonnes may . Mountain glaciers develop in high mountains and flow down. Glaciers flow very slowly with gravity created by their own mass. As a . Change region. Youre leaving natgeokids.com to visit another website! formation and movement glacial landforms the ice age erosional glacial landforms glacial erosion glaciers are capable of great erosion and sediment transport glaciers erode the land primarily in two ways plucking - lifting of rocks abrasion rocks within the ice acting like sandpaper to smooth and polish the surface below glacial erosion glacial The leading edge of the glacier is known as the terminus, the nose, or the snout. They are a great source of fresh water and are useful for the production of hydroelectric power. This is known as glacial erosion.Simply put, glacial erosion is the curving and shaping of the land beneath a moving . There have been several Ice Ages throughout history, but the most recent began in the Northern Hemisphere about 2.5 million years ago.

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glacier action in geography