The Guiana Shield is one of the three cratons of the South American Plate. It is a 1.7 billion year old Precambrian geological formation in northeast South America that forms a portion of the northern coast. The higher elevations on the shield are called the Guiana Highlands, which is where the impressive and mysterious table-like mountains called tepuis are found.
The Baltic Shield (sometimes referred to as the Fennoscandian Shield) is located in Fennoscandia, northwest Russia and under the Baltic Sea. The Baltic Shield is defined as the exposed Precambrian northwest segment of the East European Craton. It is composed mostly of Archean and Proterozoic gneisses and greenstones which have undergone numerous deformations through tectonic activity (see Geology of Fennoscandia map).
A peridotite is a dense, coarse-grained igneous rock, consisting mostly of the minerals olivine and pyroxene. Peridotite is ultramafic, as the rock contains less than 45% silica. It is high in magnesium, reflecting the high proportions of magnesium-rich olivine, with appreciable iron. Peridotite is derived from the Earth's mantle, either as solid blocks and fragments, or as crystals accumulated from magmas that formed in the mantle.
A craton is an old and stable part of the continental lithosphere. Having often survived cycles of merging and rifting of continents, cratons are generally found in the interiors of tectonic plates. They are characteristically composed of ancient crystalline basement rock, which may be covered by younger sedimentary rock. They have a thick crust and deep lithospheric roots that extend as much as a few hundred kilometers into the Earth's mantle.
A shield is generally a large area of exposed Precambrian crystalline igneous and high-grade metamorphic rocks that form tectonically stable areas. In all cases, the age of these rocks is greater than 570 million years and sometimes dates back 2 to 3.5 billion years.
The Congo craton, covered by the Palaeozoic-to-recent Congo basin, is an ancient Precambrian craton that with four others makes up the modern continent of Africa. These cratons were formed between about 3.6 and 2.0 billion years ago and have been tectonically stable since that time. All of these cratons are bounded by younger fold belts formed between 2.0 billion and 300 million years ago.
The East Antarctic craton is an ancient craton that forms most of Antarctica. It was part of the Nena supercontinent 1.8 billion years ago. During the early Paleozoic Era East Antarctica joined the Gondwana supercontinent. During the Mesozoic breakup of Gondwanaland, East Antarctica separated from other major continental areas. During and following this breakup the tectonic terranes of West Antarctica were added to form the current continent of Antarctica.
The Arabian-Nubian Shield (ANS) is an exposure of Precambrian crystalline rocks on the flanks of the Red Sea. The crystalline rocks are mostly Neoproterozoic in age. Geographically - and from north to south - the ANS includes the nations of Israel, Jordan. Egypt, Saudi Arabia, Sudan, Eritrea, Ethiopia, Yemen, and Somalia. The ANS in the north is exposed as part of the Sahara Desert and Arabian Desert, and in the south in the Ethiopian Highlands, Asir province of Arabia and Yemen Highlands.
The Bangweulu Block is a cratonic unit that forms part of the Congo craton of central Africa. The Bangweulu Block however consists of Palaeoproterozoic granitoids and volcanics, and is overlain by a Palaeoproterozoic continental sedimentary succession, the Mporokoso Group, and does not preserve much direct evidence of Archaean protoliths.
In Homer's Odyssey, Penelópē (Πηνελόπεια/Πηνελόπη) is the faithful wife of Odysseus, who keeps her suitors at bay in his long absence and is eventually rejoined with him. Her name has traditionally been associated with faithfulness, and so it was with the Greeks and Romans, but some recent feminist readings offer a more ambiguous interpretation.
1st Battalion, 8th Marines (1/8) is an infantry battalion in the United States Marine Corps based out of Camp Lejeune, North Carolina consisting of approximately 800 Marines and Sailors. Nicknamed "The Beirut Battalion," they fall under the command of the 8th Marine Regiment and the 2nd Marine Division.
Casar de Palomero is a municipality located in the province of Cáceres, Extremadura, Spain. According to the 2005 census, the municipality has a population of 1343 inhabitants. Casar de Palomero is historically not part of Las Hurdes region, but has been merged with the other municipalities of the comarca to form the Mancomunidad de Las Hurdes.
Anthu Inthu Preethi Banthu is a 2008 Indian Kannada film starring film producer Aditya Babu, making his debut as an actor, and Ramya in lead roles. The film is a remake of the 2006 Telugu film Aadavari Matalaku Ardhalu Verule, directed by Selvaraghavan, with Aditya Babu and Ramya replacing the lead couple, originally played by Venkatesh and Trisha Krishnan.
All Content in this site is the sole responsibility of the person from whom such Content originated. See our Terms of service