|
Geography Of The Falkland Islands
The Falkland Islands are located in the South Atlantic Ocean between 51°S and 53°S on a projection of the Patagonian Shelf, part of the South American continental shelf. In ancient geological time this shelf was part of Gondwana, and around 400 million years ago split from what is now Africa and drifted westwards from it. Today the islands are subjected to the Roaring Forties, winds that shape both their geography and climate. The Falklands comprise two main islands, West Falkland and East Falkland, and about 776 small islands. Geology The geological history of the Falkland Islands began during the Precambrian era more than 1 billion years ago, when Proterozoic granites and gneisses were laid down in Gondwana. These rocks became part of the Cape Meredith/ formation and outcrop at the Cape. During the Siluro-Devonian era, these rocks were overlain with quartzose and subarkosic sandstones with some siltstone and mudstone, rocks that are particularly erosion- and weather-resi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Usborne
Mount Usborne ( es, Cerro Alberdi) is a mountain on East Falkland. At above sea level, it is the highest point in the Falkland Islands. It is only taller than Mount Adam, Falkland Islands, Mount Adam, the highest peak on West Falkland. The mountain is referenced by Charles Darwin in Chapter 9 of ''Zoology of the Voyage of H.M.S. Beagle''. It is named after Alexander Burns Usborne, master's assistant on , the ship that took Darwin on his famous voyage. As one of the highest mountains of the Falklands, it experienced some glaciation. The remains of glacial cirques can be seen on the mountain. The handful of Falklands mountains over have: :''"pronounced Cirque, corries with small glacial lakes at their bases, moraine, morainic ridges deposited below the corries suggest that the glaciers and ice domes were confined to areas of maximum elevation with other parts of the islands experiencing a periglacial climate''" Strange, Ian (1983) ''The Falkland Islands'' References * Stonehou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Devonian
The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, where rocks from this period were first studied. The first significant adaptive radiation of life on dry land occurred during the Devonian. Free-sporing vascular plants began to spread across dry land, forming extensive forests which covered the continents. By the middle of the Devonian, several groups of plants had evolved leaves and true roots, and by the end of the period the first seed-bearing plants appeared. The arthropod groups of myriapods, arachnids and hexapods also became well-established early in this period, after starting their expansion to land at least from the Ordovician period. Fish reached substantial diversity during this time, leading the Devonian to often be dubbed the Age of Fishes. The placoderms began dominating ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hornby Mountains
The Hornby Mountains (or "hills") are a mountain range on West Falkland in the Falkland Islands. Mount Maria is a mountain in this range. The range runs in a group of ridges parallel to Falkland Sound The Falkland Sound ( es, Estrecho de San Carlos) is a sea strait in the Falkland Islands. Running southwest-northeast, it separates West and East Falkland. Name The sound was named by John Strong in 1690 for Viscount Falkland, the name only l ... The Hornby Mountains, have experienced tectonic forces of uplift and folding by which the quartzite beds of Argentine Port are inclined to the vertical. References External links * Mountains of West Falkland Mountain ranges of South America Landforms of the Falkland Islands {{Falklands-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fox Bay
Fox Bay ( es, Bahía Fox or ''Bahía Zorro'' ) is the second largest settlement on West Falkland in the Falkland Islands. It is located on a bay of the same name, and is on the south east coast of the island. It is often divided into Fox Bay East ("FBE") and Fox Bay West ("FBW") making it two settlements: combined, these make the largest settlement on West Falkland, but if separated, Port Howard is the largest. Fox Bay takes its name, like the Warrah River, from the Falkland fox, an animal locally called the warrah and now extinct. Fox Bay East's houses are scattered around a common. There is a school, a shop, and a post office which was founded in the 1890s. There is also a social club, and a refuelling base for RAF helicopters. In the post office building since 2015 is a small postal museum. Fox Bay has two airstrips for use by FIGAS Islander aircraft. Fox Bay West was once as large as FBE, but since the farm was subdivided and sold off in 1985 the number of residents h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Port Stephens, Falkland Islands
Port Stephens is a settlement and a harbour on West Falkland, in the Falkland Islands. It is on the far southwest of the island, near Calm Head and Cape Meredith Cape Meredith ( es, Cabo Meredith; Argentine name "Cabo Belgrano") is the southernmost point of West Falkland in the Falkland Islands. About northwest is the town of Port Stephens. There is a shanty in the area, which is a listed building ... and South Harbour is the nearest other settlement. Until recently, it was one of the Falkland Island Company's largest sheep stations. In 1989 the Company split the farm into five units which were all bought by former employees. Port Stephens is one of the five sections of the original Port Stephens farm and is owned by Peter and Ann Robertson. While the harbour itself is sheltered, the surrounding area is frequently battered by Antarctic storms. The location is highly rugged, and considered to be amongst the most scenic in the Falklands. There is a self-catering cottage ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
African Continent
Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area and 20% of its land area.Sayre, April Pulley (1999), ''Africa'', Twenty-First Century Books. . With billion people as of , it accounts for about of the world's human population. Africa's population is the youngest amongst all the continents; the median age in 2012 was 19.7, when the worldwide median age was 30.4. Despite a wide range of natural resources, Africa is the least wealthy continent per capita and second-least wealthy by total wealth, behind Oceania. Scholars have attributed this to different factors including geography, climate, tribalism, colonialism, the Cold War, neocolonialism, lack of democracy, and corruption. Despite this low concentration of wealth, recent economic expansion and the large and young population make Af ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tillite
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 deposi ... [...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 depos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moraine
A moraine is any accumulation of unconsolidated debris (regolith and rock), sometimes referred to as glacial till, that occurs in both currently and formerly glaciated regions, and that has been previously carried along by a glacier or ice sheet. It may consist of partly rounded particles ranging in size from boulders (in which case it is often referred to as boulder clay) down to gravel and sand, in a groundmass of finely-divided clayey material sometimes called glacial flour. Lateral moraines are those formed at the side of the ice flow, and terminal moraines were formed at the foot, marking the maximum advance of the glacier. Other types of moraine include ground moraines (till-covered areas forming sheets on flat or irregular topography) and medial moraines (moraines formed where two glaciers meet). Etymology The word ''moraine'' is borrowed from French , which in turn is derived from the Savoyard Italian ("mound of earth"). ''Morena'' in this case was derived from Proven ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacier
A glacier (; ) 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#Glaciology, ablation over many years, often Century, centuries. It acquires distinguishing features, such as Crevasse, crevasses and Serac, 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 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 every continent other than the Australian mainland, including Oceania's high-latitude oceanic island countries such as New Zealand. Between lati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carboniferous
The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carboniferous'' means "coal-bearing", from the Latin '' carbō'' ("coal") and '' ferō'' ("bear, carry"), and refers to the many coal beds formed globally during that time. The first of the modern 'system' names, it was coined by geologists William Conybeare and William Phillips in 1822, based on a study of the British rock succession. The Carboniferous is often treated in North America as two geological periods, the earlier Mississippian and the later Pennsylvanian. Terrestrial animal life was well established by the Carboniferous Period. Tetrapods (four limbed vertebrates), which had originated from lobe-finned fish during the preceding Devonian, became pentadactylous in and diversified during the Carboniferous, including early amphibian line ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of African Earth Sciences
The ''Journal of African Earth Sciences'' is a peer-reviewed scientific journal published by Elsevier. It covers the earth sciences, primarily on issues that are relevant to Africa and the Middle East. The journal was established in 1983 and the editors-in-chief are P.G. Eriksson and R.B.M. Mapeo. See also *''GeoArabia'' *''South African Journal of Geology The ''South African Journal of Geology'' is a quarterly peer-reviewed scientific journal published by the Geological Society of South Africa that was established in March 1896 as the ''Transactions of the Geological Society of South Africa'', obta ...'' External links * Geology journals Geology of Africa Elsevier academic journals English-language journals Publications established in 1983 {{geology-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.svg "Click for more on -> African Continent")
.JPG "Click for more on -> Moraine")
