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Ribbed Moraine
A Rogen moraine, also called ribbed moraine, is a subglacially (''i.e.'' under a glacier or ice sheet) formed type of moraine landform,Hättestrand, C. & Kleman, J., 1999. Ribbed moraine formation. ''Quaternary Science Reviews, 18'':43-61 that mainly occurs in Fennoscandia, Scotland,Finlayson, A. G. & Bradwell, T., 2008. Morphological characteristics, formation and glaciological significance of Rogen moraine in northern Scotland. ''Geomorphology, 101'':607-617 IrelandDunlop, P. & Clark, C. D., 2006. The morphological characteristics of ribbed moraine. ''Quaternary Science Reviews, 25'':1668-1691 and Canada.Marich, A., Batterson, M. & Bell, T., 2005. The morphology and sedimentological analyses of Rogen moraines, central Avalon Peninsula, Newfoundland. ''Current Research, Newfoundland and Labrador Department of Natural Resources, Geological Survey, Report, 05-1'':1-14 It is one of the three main types of hummocky moraines. They cover large areas that have been covered by ice, and oc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rogen Moraines
Rogen may refer to: * Rogen (lake), a lake on the border of Sweden and Norway People with the name * Rogen Ladon (born 1993), Filipino amateur boxer * Lauren Miller Rogen (born 1981), American actress, screenwriter, and director * Seth Rogen (born 1982), Canadian-American actor, comedian, and filmmaker See also * Rogan, surname * Rogin, surname {{disambig, given name, surname ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sweden
Sweden, formally the Kingdom of Sweden, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, and Finland to the east. At , Sweden is the largest Nordic country by both area and population, and is the List of European countries by area, fifth-largest country in Europe. Its capital and largest city is Stockholm. Sweden has a population of 10.6 million, and a low population density of ; 88% of Swedes reside in urban areas. They are mostly in the central and southern half of the country. Sweden's urban areas together cover 1.5% of its land area. Sweden has a diverse Climate of Sweden, climate owing to the length of the country, which ranges from 55th parallel north, 55°N to 69th parallel north, 69°N. Sweden has been inhabited since Prehistoric Sweden, prehistoric times around 12,000 BC. The inhabitants emerged as the Geats () and Swedes (tribe), Swedes (), who formed part of the sea-faring peopl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dead Ice
Dead ice is the ice in a part of a glacier or ice sheet that is no longer moving. As the ice melts, it leaves behind a hummocky terrain known as dead-ice moraine. Dead-ice moraine is produced by the accumulation of sediments carried by glaciers that have been left behind from ice melting. Features of such terrain include kettle holes. Landscapes forming Veiki moraines in northern Sweden and Canada have been attributed to the erosion of extensive bodies of till-covered dead ice. Formation Dead ice is created when a glacier or ice sheet experiences an increase in melting and accumulates debris from various sediment sources. The debris seeps into the ice, effectively covering the surface area. This leads to the affected area becoming mixed with different types of debris, ultimately slowing the glacier's melting rate. This process continues over and over, creating layers of ice and debris, until it forms dead ice. Dead ice most commonly occurs on Surge (glacier), surge-type glaciers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earth Surface
Earth is the third planet from the Sun and the only astronomical object known to harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all of Earth's water is contained in its global ocean, covering 70.8% of Earth's crust. The remaining 29.2% of Earth's crust is land, most of which is located in the form of continental landmasses within Earth's land hemisphere. Most of Earth's land is at least somewhat humid and covered by vegetation, while large sheets of ice at Earth's polar deserts retain more water than Earth's groundwater, lakes, rivers, and atmospheric water combined. Earth's crust consists of slowly moving tectonic plates, which interact to produce mountain ranges, volcanoes, and earthquakes. Earth has a liquid outer core that generates a magnetosphere capable of deflecting most of the destructive solar winds and cosmic radiation. Earth has a dynamic atmosphere, which sustains Earth's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sediment
Sediment is a solid material that is transported to a new location where it is deposited. It occurs naturally and, through the processes of weathering and erosion, is broken down and subsequently sediment transport, transported by the action of wind, water, or ice or by the force of gravity acting on the particles. For example, sand and silt can be carried in suspension (chemistry), suspension in river water and on reaching the sea bed deposited by sedimentation; if buried, they may eventually become sandstone and siltstone (sedimentary rocks) through lithification. Sediments are most often transported by water (fluvial, fluvial processes), but also wind (aeolian processes) and glaciers. Beach sands and stream channel, river channel deposits are examples of fluvial transport and deposition (geology), deposition, though sediment also often settles out of slow-moving or standing water in lakes and oceans. Desert sand dunes and loess are examples of aeolian transport and deposition. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terminal Moraine
A terminal moraine, also called an end moraine, is a type of moraine that forms at the terminal (edge) of a glacier, marking its maximum advance. At this point, debris that has accumulated by plucking and abrasion, has been pushed by the front edge of the ice, is driven no further and instead is deposited in an unsorted pile of sediment. Because the glacier acts very much like a conveyor belt, the longer it stays in one place, the greater the amount of material that will be deposited. The moraine is left as the marking point of the terminal extent of the ice. Formation As a glacier moves along its path, the surrounding area is continuously eroding. Loose rock and pieces of bedrock are constantly being picked up and transported with the glacier. Fine sediment and particles are also incorporated into the glacial ice. The accumulation of these rocks and sediment together form what is called glacial till when deposited. Push moraines are formed when a glacier retreats from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flute (glacial)
Glacial flutes, also known as glacial fluting, are low, narrow, elongate, straight, parallel ridges that range between several centimeters to a few meters both in width and height. This glacial landform generally consist of glacial till, but sometimes either sand or silt and clay. They form subglacially and are orientated parallel to the direction of glacier flow. They occur in parallel sets of ridges known as ''swarms''.Bell, T., Cooper, A.K., Solheim, A., Todd, B.J., Dowdeswell, J.A., and others, 2016. ''Glossary of glaciated continental margins and related geoscience methods.'' In: Dowdeswell, J.A., Canals, M., Jakobson, M., Todd, B.J., Dowdeswell, E.K. and Hogan, K.A., eds. ''Atlas of Submarine Glacial Landforms: Modern, Quaternary and Ancient.'' Geological Society, London, Memoirs, 46, 555–574.Boyall, L., 2021''Flute-formation'' [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drumlin
A drumlin, from the Irish word ("little ridge"), first recorded in 1833, in the classical sense is an elongated hill in the shape of an inverted spoon or half-buried egg formed by glacial ice acting on underlying unconsolidated till or ground moraine. Assemblages of drumlins are referred to as fields or swarms; they can create a landscape which is often described as having a 'basket of eggs topography'. Morphology Drumlins occur in various shapes and sizes, including symmetrical (about the long axis), spindle, parabolic forms, and transverse asymmetrical forms. Generally, they are elongated, oval-shaped hills, with a long axis parallel to the orientation of ice flow and with an up-ice (stoss) face that is generally steeper than the down-ice (lee) face. Drumlins are typically between long and between wide. Drumlins generally have a length to width ratio of between 1.7 and 4.1 and it has been suggested that this ratio can indicate the velocity of the glacier. That is, since ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Till
image:Geschiebemergel.JPG, Closeup of glacial till. Note that the larger grains (pebbles and gravel) in the till are completely surrounded by the matrix of finer material (silt and sand), and this characteristic, known as ''matrix support'', is diagnostic of till. image:Glacial till exposed in roadcut-750px.jpg, Glacial till with tufts of grass Till or glacial till is unsorted glacier, glacial sediment. Till is derived from the erosion and entrainment of material by the moving ice of a glacier. It is deposited some distance down-ice to form terminal, lateral, medial and ground moraines. Till is classified into primary deposits, laid down directly by glaciers, and secondary deposits, reworked by fluvial transport and other processes. Description Till is a form of '' glacial drift'', which is rock material transported by a glacier and deposited directly from the ice or from running water emerging from the ice. It is distinguished from other forms of drift in that it is de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rogen Nature Reserve
Rogen Nature Reserve () is a nature reserve in Jämtland County in Sweden. It is part of the EU-wide Natura 2000-network. The nature reserve is centred on Lake Rogen and is part of a wider network of nature protection areas that extend also on the other side of the border with Norway. The landscape is distinctly characterised by Rogen moraine, a type of moraine named after the area. It consists of long, sinuous low hills interspersed with long lakes. In addition, large erratic boulders are spread over the land. In all directions, mountain tops — parts of the Scandinavian Mountains — rise to about . The highest peak in the area is ''Brattriet'' with an altitude of . The landscape was formed during the last Ice age, and has been described as "labyrinthine". Fauna The nature reserve has a rich fauna. European otter, Eurasian lynx, brown bear and wolverine all inhabit the nature reserve. Birds such as golden eagle, black-throated loon, rough-legged buzzard and osprey have all ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Härjedalen
Härjedalen () is a historical province (''landskap'') in the centre of Sweden. It borders the Norwegian county of Trøndelag, as well as the provinces of Dalarna, Hälsingland, Medelpad and Jämtland. The province originally belonged to Norway, but was ceded to Sweden in the Second Treaty of Brömsebro in 1645. The province forms the bulk of Härjedalen Municipality of which the village of Sveg is the seat. Etymology The name ''Härjedalen'', from Old West Norse , literally means the "Valley of the Härje river". A Latinized transliteration is Herdalia although that name is today hardly encountered in the English today. More prominent are derivations such as ''Herjedalen'' or ''Haerjedalen''. The more prosaic explanation of the name is that the word ''her'' or ''har'' means only "mound of stones" and refers to stones in the river . History Härjedalen and Jämtland were provinces of Denmark-Norway until the mid-17th century. After the Treaty of Brömsebro in 1645, H� ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacier
A glacier (; or ) is a persistent body of dense ice, a form of rock, that is constantly moving downhill 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 its weight. As it moves, it abrades rock and debris from its substrate to create landforms such as cirques, moraines, or fjords. Although a glacier may flow into a body of water, it forms only on land“Glacier, N., Pronunciation.” Oxford English Dictionary, Oxford UP, June 2024, https://doi.org/10.1093/OED/7553486115. Accessed 25 Jan. 2025. and is distinct from the much thinner sea ice and lake ice that form on the surface of bodies of water. On Earth, 99% of glacial ice is contained within vast ice sheets (also known as "continental glaciers") in the polar regions, but glaciers may be found in mountain ranges on ever ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
