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Spanish Virgin Islands
The Spanish Virgin Islands (), formerly called the Passage Islands (Spanish: ''Islas del Pasaje''), commonly known as the Puerto Rican Virgin Islands (), consist of the islands of Vieques and Culebra, situated between the main island of Puerto Rico and the U.S. Virgin Islands in the northeastern Caribbean. Located between the Greater and Lesser Antilles, the islands are administratively part of the archipelago of Puerto Rico, and geographically part of the archipelago of the Virgin Islands of the Leeward Islands in the Lesser Antilles. Geologically separated from the Greater Antilles island of Hispaniola by the Mona Passage and from the Lesser Antilles island arc by the Anegada Passage, the main island of Puerto Rico, the Spanish Virgin Islands of Vieques and Culebra, the British Virgin Islands, and the U.S. Virgin Islands except for the southernmost island of Saint Croix, all lie on the same carbonate platform and insular shelf, the Puerto Rico Bank, between the Nort ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satellite Imagery
Satellite images (also Earth observation imagery, spaceborne photography, or simply satellite photo) are images of Earth collected by imaging satellites operated by governments and businesses around the world. Satellite imaging companies sell images by licensing them to governments and businesses such as Apple Maps and Google Maps. History The first images from space were taken on sub-orbital flights. The US-launched V-2 flight on October 24, 1946, took one image every 1.5 seconds. With an apogee of 65 miles (105 km), these photos were from five times higher than the previous record, the 13.7 miles (22 km) by the Explorer II balloon mission in 1935. The first satellite (orbital) photographs of Earth were made on August 14, 1959, by the U.S. Explorer 6. The first satellite photographs of the Moon might have been made on October 6, 1959, by the Soviet satellite Luna 3, on a mission to photograph the far side of the Moon. The Blue Marble photograph was taken from sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anegada Passage
The Anegada Passage , also known as the Anegada Trough, is a strait in the Caribbean that separates the British Virgin Islands and the British ruled Sombrero Island of Anguilla, and connects the Caribbean and the Atlantic Ocean. It is 2300 m deep. Because the threshold depths are 1800 and 1600 m, Atlantic deep water from 1600 m level may flow into the deep areas in the Caribbean Sea. The Anegada Passage is a key shipping lane for the Panama Canal. Often called the "Oh-my-god-a Passage", it is considered a difficult passage for sailors because of the winds, waves, and swells. The Anegada Passage was the site of the 1867 Virgin Islands earthquake and subsequent tsunami. Geographic extent The multiple fault lines, ridges, and basins, including the Virgin Islands Basin, Anegada Gap, and Sombrero Basin, that form part of the general trough stretching from the southeastern Puerto Rican mainland in the Caribbean Sea to the northeastern British Virgin Island of Anegada in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spanish Empire
The Spanish Empire, sometimes referred to as the Hispanic Monarchy (political entity), Hispanic Monarchy or the Catholic Monarchy, was a colonial empire that existed between 1492 and 1976. In conjunction with the Portuguese Empire, it ushered in the European Age of Discovery. It achieved a global scale, controlling vast portions of the Americas, Africa, various islands in Asia and Oceania, as well as territory in other parts of Europe. It was one of the most powerful empires of the early modern period, becoming known as "the empire on which the sun never sets". At its greatest extent in the late 1700s and early 1800s, the Spanish Empire covered , making it one of the List of largest empires, largest empires in history. Beginning with the 1492 arrival of Christopher Columbus and continuing for over three centuries, the Spanish Empire would expand across the Caribbean Islands, half of South America, most of Central America and much of North America. In the beginning, Portugal was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Voyages Of Christopher Columbus
Between 1492 and 1504, the Italian explorer and navigator Christopher Columbus led four transatlantic maritime expeditions in the name of the Catholic Monarchs of Spain to the Caribbean and to Central and South America. These voyages led to the widespread knowledge of the New World. This breakthrough inaugurated the period known as the Age of Exploration, which saw the colonization of the Americas, a related biological exchange, and trans-Atlantic trade. These events, the effects and consequences of which persist to the present, are often cited as the beginning of the modern era. Born in the Republic of Genoa, Columbus was a navigator who sailed in search of a westward route to India, China, Japan and the Spice Islands thought to be the East Asian source of spices and other precious oriental goods obtainable only through arduous overland routes. Columbus was partly inspired by 13th-century Italian explorer Marco Polo in his ambition to explore Asia. His initial belief ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint Ursula
Ursula (Latin for 'little she-bear') was a Romano-British virgin and martyr possibly of royal origin. She is venerated as a saint in the Roman Catholic Church, Eastern Orthodox Church and the Anglican Communion. Her feast day in the pre-1970 General Roman Calendar and in some regional calendars of the ordinary form of the Roman Rite is 21 October. History There is little information about Ursula or the anonymous group of holy virgins who accompanied her and, on an uncertain date, were killed along with her at Colonia Agrippina. They remain in the Roman Martyrology, although their commemoration does not appear in the simplified General Roman Calendar of the 1970 Missale Romanum. The earliest evidence of a cult of martyred virgins at Cologne is an inscription from in the Church of St. Ursula, located on Ursulaplatz in Cologne. This inscription commonly referred to as the Clematius Inscription states that the ancient basilica had been restored by senator Clemantius on the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christopher Columbus
Christopher Columbus (; between 25 August and 31 October 1451 – 20 May 1506) was an Italians, Italian explorer and navigator from the Republic of Genoa who completed Voyages of Christopher Columbus, four Spanish-based voyages across the Atlantic Ocean sponsored by the Catholic Monarchs, opening the way for the widespread European Age of Discovery, exploration and colonization of the Americas. His expeditions were the first known European contact with the Caribbean and Central and South America. The name ''Christopher Columbus'' is the Anglicisation (linguistics), anglicization of the Latin . Growing up on the coast of Liguria, he went to sea at a young age and traveled widely, as far north as the British Isles and as far south as what is now Ghana. He married Portuguese noblewoman Filipa Moniz Perestrelo, who bore a son, Diego Columbus, Diego, and was based in Lisbon for several years. He later took a Castilian mistress, Beatriz Enríquez de Arana, who bore a son, Ferdinand ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archipelago
An archipelago ( ), sometimes called an island group or island chain, is a chain, cluster, or collection of islands. An archipelago may be in an ocean, a sea, or a smaller body of water. Example archipelagos include the Aegean Islands (the origin of the term), the Canadian Arctic Archipelago, the Stockholm Archipelago, the Malay Archipelago (which includes the Indonesian and Philippine Archipelagos), the Lucayan (Bahamian) Archipelago, the Japanese archipelago, and the Hawaiian Archipelago. Etymology The word ''archipelago'' is derived from the Italian ''arcipelago'', used as a proper name for the Aegean Sea, itself perhaps a deformation of the Greek Αιγαίον Πέλαγος. Later, usage shifted to refer to the Aegean Islands (since the sea has a large number of islands). The erudite paretymology, deriving the word from Ancient Greek ἄρχι-(''arkhi-'', "chief") and πέλαγος (''pélagos'', "sea"), proposed by Buondelmonti, can still be found. Geograph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Puerto Rico–Virgin Islands Microplate
The Puerto Rico–Virgin Islands microplate (PRVI), also known as the Puerto Rico–Virgin Islands block, is a tectonic microplate formed at the boundary zone between the Caribbean plate and the obliquely subducting North American plate. Details Consisting of the archipelagos of Puerto Rico and the Virgin Islands, it is bounded to the north by the Puerto Rico Trench, to the south by the Muertos Trough, to the east by the Virgin Island Basin, Anegada Gap, and Sombrero Basin in the Anegada Passage, and to west by the Yuma Basin and Mona Canyon in the Mona Passage. The existence of this microplate was first proposed in 1991. GPS has monitored the microplate with permanent stations for more than two decades. Puerto Rico and the Virgin Islands lie on the same carbonate platform, the Puerto Rico Bank The Puerto Rico Bank (PRB) (Spanish: ''Banco de Puerto Rico''), also known as the Puerto Rican Bank (PRB), is a carbonate platform and insular shelf comprising the archip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Tectonic Plates
This is a list of tectonic plates on Earth#Surface, Earth's surface. Plate tectonics, Tectonic plates are pieces of Earth's crust and uppermost mantle (geology), mantle, together referred to as the lithosphere. The plates are around thick and consist of two principal types of material: oceanic crust (also called ''Sima (geology), sima'' from silicon and magnesium) and continental crust (''sial'' from silicon and aluminium). The composition of the two types of crust differs markedly, with mafic basaltic rocks dominating oceanic crust, while continental crust consists principally of lower-density felsic granite, granitic rocks. Current plates Geologists generally agree that the following tectonic plates currently exist on Earth#Surface, Earth's surface with roughly definable boundaries. Tectonic plates are sometimes subdivided into three fairly arbitrary categories: ''major'' (or ''primary'') ''plates'', ''minor'' (or ''secondary'') ''plates'', and ''microplates'' (or ''tertiary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlantic Ocean
The Atlantic Ocean is the second largest of the world's five borders of the oceans, oceanic divisions, with an area of about . It covers approximately 17% of Earth#Surface, Earth's surface and about 24% of its water surface area. During the Age of Discovery, it was known for separating the New World of the Americas (North America and South America) from the Old World of Afro-Eurasia (Africa, Asia, and Europe). Through its separation of Afro-Eurasia from the Americas, the Atlantic Ocean has played a central role in the development of human society, globalization, and the histories of many nations. While the Norse colonization of North America, Norse were the first known humans to cross the Atlantic, it was the expedition of Christopher Columbus in 1492 that proved to be the most consequential. Columbus's expedition ushered in an Age of Discovery, age of exploration and colonization of the Americas by European powers, most notably Portuguese Empire, Portugal, Spanish Empire, Sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Puerto Rico Bank
The Puerto Rico Bank (PRB) (Spanish: ''Banco de Puerto Rico''), also known as the Puerto Rican Bank (PRB), is a carbonate platform and insular shelf comprising the archipelagos of Puerto Rico and the Virgin Islands, located between the Greater Antilles and the Lesser Antilles in the northeastern Caribbean. Last subaerially exposed from the Last Glacial Maximum in the Last Glacial Period of the Late Pleistocene Age to the Northgrippian Age of the Holocene Epoch, the bank connected Puerto Rico and the Virgin Islands into a single landmass until sea level rise fragmented it into the present-day islands between 10,000 and 7,000 years Before Present (8,050 and 5,050 years Before Common Era). It is within the Puerto Rico–Virgin Islands microplate between the North American plate and Caribbean plate. Name Most commonly known as the ''Puerto Rico Bank'' and ''Puerto Rican Bank,'' the bank is named after the largest island within its limits, the eponymous main island of the arch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Continental Shelf
A continental shelf is a portion of a continent that is submerged under an area of relatively shallow water, known as a shelf sea. Much of these shelves were exposed by drops in sea level during glacial periods. The shelf surrounding an island is known as an "''insular shelf''." The continental margin, between the continental shelf and the abyssal plain, comprises a steep continental slope, surrounded by the flatter continental rise, in which sediment from the continent above cascades down the slope and accumulates as a pile of sediment at the base of the slope. Extending as far as 500 km (310 mi) from the slope, it consists of thick sediments deposited by turbidity currents from the shelf and slope. The continental rise's gradient is intermediate between the gradients of the slope and the shelf. Under the United Nations Convention on the Law of the Sea, the name continental shelf was given a legal definition as the stretch of the seabed adjacent to the shores ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
