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Prince Leopold Island
Prince Leopold Island ( iu, ᐅᑉᐸᐃᑦ, ) is an island in the Qikiqtaaluk Region of Nunavut, Canada. It is located in Lancaster Sound at the junction of Prince Regent Inlet and Barrow Strait. Somerset Island is situated to the southwest; Port Leopold, an abandoned trading post, is the closest landmark. The island is significant as a summer habitat and breeding ground for large populations of several arctic bird species. History Evidence of Inuit habitation in the form of house pits and bones from bowhead whales and other marine mammals is present on the north and southeast spits of the island. The island and Somerset Island to its south were first sighted by a European on August 4, 1819, during William Parry's 1819 expedition, who named them Prince Leopold's Isles after then prince Leopold of Saxe-Coburg-Saalfeld (the future King Leopold I of Belgium). Ornithological field research began on the island in the 1950s, and an Environment Canada research station was establishe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grise Fiord, Nunavut
Grise Fiord (; iu, ᐊᐅᔪᐃᑦᑐᖅ, translit=Aujuittuq, lit=place that never thaws, italics=no) is an Inuit hamlet on the southern tip of Ellesmere Island, in the Qikiqtaaluk Region, Nunavut, Canada. It is one of three populated places on the island; despite its low population (144 residents as of the 2021 Canadian census), it is the largest community (and only public community) on Ellesmere Island. The hamlet at Grise Fiord, created by the Canadian Government in 1953 through a relocation of Inuit families from Inukjuak, Quebec, is the northernmost public community in Canada. It is also one of the coldest inhabited places in the world, with an average yearly temperature of . History Creation This community (and that of Resolute) was created by the Canadian government in 1953, partly to assert sovereignty in the High Arctic during the Cold War. Eight Inuit families from Inukjuak, Quebec (on the Ungava Peninsula), were relocated after being promised homes and gam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Parry (explorer)
Sir William Edward Parry (19 December 1790 – 8 July 1855) was an Royal Navy officer and explorer best known for his 1819–1820 expedition through the Parry Channel, probably the most successful in the long quest for the Northwest Passage, until it was finally negotiated by Roald Amundsen in 1906. In 1827, Parry attempted one of the earliest expeditions to the North Pole. He reached 82° 45' N, setting a record for human exploration Farthest North that stood for nearly five decades before being surpassed at 83° 20' N by Albert Hastings Markham in 1875. Early life Parry was born in Bath, Somerset, the son of Caleb Hillier Parry and Sarah Rigby. He was educated at King Edward's School. At the age of thirteen he joined the flagship of Admiral Sir William Cornwallis in the Channel fleet as a first-class volunteer, in 1806 became a midshipman, and in 1810 received promotion to the rank of lieutenant in the frigate ''Alexander'', which spent the ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bird Sanctuary
An animal sanctuary is a facility where animals are brought to live and to be protected for the rest of their lives. Pattrice Jones, co-founder of VINE Sanctuary defines an animal sanctuary as "a safe-enough place or relationship within the continuing hazards that menace everybody". In addition, sanctuaries are an experimental staging ground for transformative human–animal relations. There are five types of animal sanctuaries reflective of the species-belonging of the residents: 1) companion animal sanctuaries; 2) wildlife sanctuaries; 3) exotic animal sanctuaries; 4) farmed animal sanctuaries; and 5) cetacean sanctuaries. Unlike animal shelters, sanctuaries do not seek to place animals with individuals or groups, instead maintaining each animal until their natural death (either from disease or from other animals in the sanctuary). However, they can offer rehoming services. In some cases, an establishment may have characteristics of both a sanctuary and a shelter; for instanc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bird Migration
Bird migration is the regular seasonal movement, often north and south along a flyway, between breeding and wintering grounds. Many species of bird migrate. Migration carries high costs in predation and mortality, including from hunting by humans, and is driven primarily by the availability of food. It occurs mainly in the northern hemisphere, where birds are funneled onto specific routes by natural barriers such as the Mediterranean Sea or the Caribbean Sea. Migration of species such as storks, turtle doves, and swallows was recorded as many as 3,000 years ago by Ancient Greek authors, including Homer and Aristotle, and in the Book of Job. More recently, Johannes Leche began recording dates of arrivals of spring migrants in Finland in 1749, and modern scientific studies have used techniques including bird ringing and satellite tracking to trace migrants. Threats to migratory birds have grown with habitat destruction, especially of stopover and wintering sites, as wel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Important Bird Area
An Important Bird and Biodiversity Area (IBA) is an area identified using an internationally agreed set of criteria as being globally important for the conservation of bird populations. IBA was developed and sites are identified by BirdLife International. There are over 13,000 IBAs worldwide. These sites are small enough to be entirely conserved and differ in their character, habitat or ornithological importance from the surrounding habitat. In the United States the Program is administered by the National Audubon Society. Often IBAs form part of a country's existing protected area network, and so are protected under national legislation. Legal recognition and protection of IBAs that are not within existing protected areas varies within different countries. Some countries have a National IBA Conservation Strategy, whereas in others protection is completely lacking. History In 1985, following a specific request from the European Economic Community, Birdlife International ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandstone
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) because they are the most resistant minerals to weathering processes at the Earth's surface. Like uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions. Rock formations that are primarily composed of sandstone usually allow the percolation of water and other fluids and are porous enough to store large quantities, making them valuable aquifers and petroleum reservoirs. Quartz-bearing sandstone can be changed into quartzite through metamorphism, usually related to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, . ''Magnesian limestone'' is an obsolete and poorly-defined term used variously for dolomite, for limes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silurian
The Silurian ( ) is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at million years ago ( Mya), to the beginning of the Devonian Period, Mya. The Silurian is the shortest period of the Paleozoic Era. As with other geologic periods, the rock beds that define the period's start and end are well identified, but the exact dates are uncertain by a few million years. The base of the Silurian is set at a series of major Ordovician–Silurian extinction events when up to 60% of marine genera were wiped out. One important event in this period was the initial establishment of terrestrial life in what is known as the Silurian-Devonian Terrestrial Revolution: vascular plants emerged from more primitive land plants, dikaryan fungi started expanding and diversifying along with glomeromycotan fungi, and three groups of arthropods (myriapods, arachnids and hexapods) became fully terrestrialized. A significant evolutionary milestone during ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bed (geology)
In geology, a bed is a layer of sediment, sedimentary rock, or pyroclastic material "bounded above and below by more or less well-defined bedding surfaces".Neuendorf, K.K.E., J.P. Mehl, Jr., and J.A. Jackson, eds., 2005. ''Glossary of Geology'' (5th ed.). Alexandria, Virginia; American Geological Institute. p 61. Specifically in sedimentology, a bed can be defined in one of two major ways.Davies, N.S., and Shillito, A.P. 2021, ''True substrates: the exceptional resolution and unexceptional preservation of deep time snapshots on bedding surfaces.'' ''Sedimentology.'' published online 22 May 2021, doi: 10.1111/sed.12900. First, Campbell and Reineck and SinghReineck, H.E., and Singh, I.B., 1980. ''Depositional Sedimentary Environments'', (2nd ed.) Berlin, Germany: Springer-Verlag, 504 pp. use the term ''bed'' to refer to a thickness-independent layer comprising a coherent layer of sedimentary rock, sediment, or pyroclastic material bounded above and below by surfaces known as beddi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bedrock
In geology, bedrock is solid Rock (geology), rock that lies under loose material (regolith) within the crust (geology), crust of Earth or another terrestrial planet. Definition Bedrock is the solid rock that underlies looser surface material. An exposed portion of bedrock is often called an outcrop. The various kinds of broken and weathered rock material, such as soil and subsoil, that may overlie the bedrock are known as regolith. Engineering geology The surface of the bedrock beneath the soil cover (regolith) is also known as ''rockhead'' in engineering geology, and its identification by digging, drilling or geophysics, geophysical methods is an important task in most civil engineering projects. Superficial deposition (geology), deposits can be very thick, such that the bedrock lies hundreds of meters below the surface. Weathering of bedrock Exposed bedrock experiences weathering, which may be physical or chemical, and which alters the structure of the rock to leave ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perennial Stream
A perennial stream is a stream that has continuous flow of surface water throughout the year in at least parts of its catchment during seasons of normal rainfall, Water Supply Paper 494. as opposed to intermittent river, one whose flow is intermittent. In the absence of irregular, prolonged or extreme drought, a perennial stream is a watercourse, or segment, element or emerging body of water which continually delivers groundwater. For example, an damming, artificial disruption of stream, variability in flow or stream selection associated with the activity in hydropower installations, do not affect this status. Perennial streams do not include stagnant water (stream pool, pools and puddle, waterholes), reservoirs, oxbow lake, cutoff lakes and ponds that persist throughout the year. All other streams, or parts of them, should be considered seasonal rivers or lakes. The stream can cycle from intermittent to perpetual through multiple iterations. Stream Definition The basic conc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spit (landform)
A spit or sandspit is a deposition bar or beach landform off coasts or lake shores. It develops in places where re-entrance occurs, such as at a cove's headlands, by the process of longshore drift by longshore currents. The drift occurs due to waves meeting the beach at an oblique angle, moving sediment down the beach in a zigzag pattern. This is complemented by longshore currents, which further transport sediment through the water alongside the beach. These currents are caused by the same waves that cause the drift. Hydrology and geology Where the direction of the shore inland ''re-enters'', or changes direction, for example at a headland, the longshore current spreads out or dissipates. No longer able to carry the full load, much of the sediment is dropped. This is called deposition. This submerged bar of sediment allows longshore drift or littoral drift to continue to transport sediment in the direction the waves are breaking, forming an above-water spit. Without the co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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