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Jamanota
Jamanota is a hill situated within Aruba's Arikok National Park, reaching a height of and holding the distinction of being the highest point on the island. Jamanota is a word from the Arawak language and can be explained somewhat as follows: JA or YA is spirit; MA is great or great spirit; NO is a suffix denoting a plural; TA is source. So about, Source of Great Spirits. This region is known for its rugged and dry landscape, as well as its diverse wildlife, such as the Aruba Parakeet, Aruba Island Rattlesnake, and freely-roaming goats that graze upon the undulating hills of the region. At Jamanota's summit, one can experience a panoramic view that encompasses Frenchman's Pass along the southern coastline, which holds historical significance as indigenous people once defended the island against the French invaders. Geology Aruba features three distinct landscapes, each characterized by unique geological formations. In the northwestern part of the island one can find the fl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arikok National Park
Arikok National Park, covering in the northeastern region of Aruba, was officially established in 2000. Approximately 20% of Aruba's total land area is designated as a National Park, dedicated to safeguarding the park's biodiversity, geological formations and historical and cultural significance. Etymology The establishment of Cunucu Arikok resulted from the development of Arikok National Park. This region was once a small plantation owned by Arie Kok, featuring an adobe house ('' cas di torto''). Surrounding the house, there existed a substantial, wild garden with nameplates highlighting various common Aruban plant species. Moreover, within the rural expanse, dolerite rocks adorned with indigenous rock paintings can be found. One of these paintings serves as the current logo of the nature reserve. The reserve's name also originates from the proprietor of the adobe house, which remains within the reserve in a renovated state. History Cultural and human history Arikok Nationa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hooiberg
( Dutch: /ˈɦojbɛrx/ ()) is a distinctively shaped, conical hill located at the heart of the island of Aruba. This geological formation is a prominent and recognizable landmark that has long captured the attention of locals and visitors alike—Hooiberg is Aruba's centerpiece. Name Many old place names ( toponyms) on Aruba have indigenous origins, but the language that was spoken in the past has been lost to posterity. Historically, this hill was known as ''Orcuyo,'' an old indigenous name. The hill has had various names throughout the years. In Spanish, it was called ''Cerro de Paja ó Pan de Azucar'', meaning "hill of straw", "sugar bread", or " sugarloaf". Sugarloaf refers to refined sugar shaped into a tall conical form, which was sold before the 1900s. Hooiberg is one of several formations named after Cerro Pan de Azucar (such as Pan de Azucar Island in the Philippines or Sugarloaf Mountain in Brazil). The Dutch gave it their own name, and the spelling of Hooiberg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grain Size
Grain size (or particle size) is the diameter of individual grains of sediment, or the lithified particles in clastic rocks. The term may also be applied to other granular materials. This is different from the crystallite size, which refers to the size of a single crystal inside a particle or grain. A single grain can be composed of several crystals. Granular material can range from very small colloidal particles, through clay, silt, sand, gravel, and cobbles, to boulders. Krumbein phi scale Size ranges define limits of classes that are given names in the Wentworth scale (or Udden–Wentworth scale named after geologists Chester K. Wentworth and Johan A. Udden) used in the United States. The Krumbein ''phi'' (φ) scale, a modification of the Wentworth scale created by W. C. Krumbein in 1934, is a logarithmic scale computed by the equation :\varphi=-\log_2, where :\varphi is the Krumbein phi scale, :D is the diameter In geometry, a diameter of a circle i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schist
Schist ( ) is a medium-grained metamorphic rock generally derived from fine-grained sedimentary rock, like shale. It shows pronounced ''schistosity'' (named for the rock). This means that the rock is composed of mineral grains easily seen with a low-power hand lens, oriented in such a way that the rock is easily split into thin flakes or plates. This texture (geology), texture reflects a high content of platy minerals, such as mica, talc, chlorite group, chlorite, or graphite. These are often interleaved with more granular minerals, such as feldspar or quartz. Schist typically forms during regional metamorphism accompanying the process of mountain building (orogeny) and usually reflects a medium Metamorphism#Metamorphic grades, grade of metamorphism. Schist can form from many different kinds of rocks, including sedimentary rocks such as mudstones and igneous rocks such as tuffs. Schist metamorphosed from mudstone is particularly common and is often very rich in mica (a ''mica schis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stonehenge
Stonehenge is a prehistoric Megalith, megalithic structure on Salisbury Plain in Wiltshire, England, west of Amesbury. It consists of an outer ring of vertical sarsen standing stones, each around high, wide, and weighing around 25 tons, topped by connecting horizontal lintel stones, held in place with mortise and tenon joints, a feature unique among contemporary monuments. Inside is a ring of smaller bluestones. Inside these are free-standing trilithons, two bulkier vertical sarsens joined by one lintel. The whole monument, now ruinous, is aligned towards the sunrise on the summer solstice and sunset on the winter solstice. The stones are set within Earthwork (archaeology), earthworks in the middle of the densest complex of Neolithic British Isles, Neolithic and Bronze Age Britain, Bronze Age monuments in England, including several hundred ''tumuli'' (burial mounds). Stonehenge was constructed in several phases beginning about 3100 BC and continuing until about 1600 B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bluestone
Bluestone is a cultural or commercial name for a number of natural dimension stone, dimension or building stone varieties, including: * basalt in Victoria (Australia), Victoria, Australia, and in New Zealand * diabase, dolerites in Tasmania, Australia; and in Britain (including Stonehenge) * feldspar, feldspathic sandstone in the US and Canada * limestone in the Shenandoah Valley in the US, from the Hainaut (province), Hainaut quarries in Soignies, Belgium, and from quarries in County Carlow, County Galway and County Kilkenny in Ireland * slate in South Australia It is unrelated to human-made blue brick. Stonehenge The term "bluestone" in Britain is used in a loose sense to cover all of the "foreign", not intrinsic, stones and rock debris at Stonehenge. It is a "convenience" label rather than a geological term, since at least 46 different rock types are represented. One of the most common rocks in the assemblage is known as Preseli spotted dolerite—a chemically altered i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bushiribana And Balashi
Bushiribana and Balashi are the sites of two former gold smelters on the Caribbean island of Aruba. Bushiribana The Aruba Island Gold Mining Company built the Bushiribana smelter in 1825 to extract gold from the ore that was being mined in the nearby hills of Ceru Plat; it operated for ten years. Today, its remains are a stopping-off point for tourists on their way to view the Aruba Natural Bridge, which collapsed on 2 September 2005. Balashi In 1899, the Aruba Gold Concessions Company built a gold smelter at Balashi, at the southern end of Frenchman's Pass. In 1916 during the First World War, it closed for lack of raw materials and spare parts, as most of them came from Germany. In 1933, a sea water desalination Desalination is a process that removes mineral components from saline water. More generally, desalination is the removal of salts and minerals from a substance. One example is Soil salinity control, soil desalination. This is important for agric ... plant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laccolith
A laccolith is a body of intrusive rock with a dome-shaped upper surface and a level base, fed by a conduit from below. A laccolith forms when magma (molten rock) rising through the Earth's crust begins to spread out horizontally, prying apart the host rock strata. The pressure of the magma is high enough that the overlying strata are forced upward, giving the laccolith its dome-like form. Over time, erosion can expose the solidified laccolith, which is typically more resistant to weathering than the host rock. The exposed laccolith then forms a hill or mountain. The Henry Mountains of Utah, US, are an example of a mountain range composed of exposed laccoliths. It was here that geologist Grove Karl Gilbert carried out pioneering field work on this type of intrusion. Laccolith mountains have since been identified in many other parts of the world. Description A laccolith is a type of igneous intrusion, formed when magma forces its way upwards through the Earth's crust but cool ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lopolith
A lopolith is a large igneous intrusion which is lenticular in shape with a depressed central region. Lopoliths are generally concordant with the intruded strata with dike or funnel-shaped feeder bodies below the body. The term was first defined and used by Frank Fitch Grout during the early 1900s in describing the Duluth gabbro complex in northern Minnesota and adjacent Ontario. Lopoliths typically consist of large layered intrusions that range in age from Archean to Eocene. Examples include the Duluth gabbro, the Sudbury igneous complex of Ontario, the Bushveld igneous complex of South Africa, the Great Dyke in Zimbabwe, the Skaergaard complex of Greenland and the Humboldt lopolith of Nevada. The Sudbury occurrence has been attributed to an impact event and associated crustal melting. See also * Laccolith * Phacolith *Batholith A batholith () is a large mass of intrusive rock, intrusive igneous rock (also called plutonic rock), larger than in area, that forms from c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dike (geology)
In geology, a dike or dyke is a sheet of rock that is formed in a fracture of a pre-existing rock body. Dikes can be either magmatic or sedimentary in origin. Magmatic dikes form when magma flows into a crack then solidifies as a sheet intrusion, either cutting across layers of rock or through a contiguous mass of rock. Clastic dikes are formed when sediment fills a pre-existing crack.Essentials of Geology, 3rd Ed, Stephen Marshak Magmatic dikes A magmatic dike is a sheet of igneous rock that cuts across older rock beds. It is formed when magma fills a fracture in the older beds and then cools and solidifies. The dike rock is usually more resistant to weathering than the surrounding rock, so that erosion exposes the dike as a natural wall or ridge. It is from these natural walls that dikes get their name. Dikes preserve a record of the fissures through which most mafic magma (fluid magma low in silica) reaches the surface. They are studied by geologists for the clues they ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sill (geology)
In geology, a sill is a tabular sheet intrusion that has intruded between older layers of sedimentary rock, beds of volcanic lava or tuff, or along the direction of foliation in metamorphic rock. A sill is a ''concordant intrusive sheet'', meaning that it does not cut across preexisting rock beds. Stacking of sills builds a sill complex. and a large magma chamber at high magma flux. In contrast, a dike is a discordant intrusive sheet, which does cut across older rocks. Formation Sills are fed by dikes, except in unusual locations where they form in nearly vertical beds attached directly to a magma source. The rocks must be brittle and fracture to create the planes along which the magma intrudes the parent rock bodies, whether this occurs along preexisting planes between sedimentary or volcanic beds or weakened planes related to foliation in metamorphic rock. These planes or weakened areas allow the intrusion of a thin sheet-like body of magma paralleling the existi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
