Cape Johnson Guyot

	Cape Johnson Guyot Cape Johnson Guyot is a guyot in the Pacific Ocean, more precisely in the Mid-Pacific Mountains, and the type locality of guyots. It is of middle Cretaceous age and a number of fossils have been dredged from it. Name Cape Johnson Guyot is also known as Cape Johnson Seamount or Cape Johnson Tablemount. The guyot was named by Harry Hammond Hess, after his ship the ; Hess had also named the kind of flat-topped seamount "guyot" and another seamount was named after Hess himself. The seamount was first described in a 1946 publication. Both Hess and Cape Johnson were discovered during the same cruise and Cape Johnson Guyot is the type locality of guyots. Geography and geology The seamount lies in the Mid-Pacific Mountains on their southern side and is a submarine mountain with a flat top that rises over to a depth of -. The flat top has an oval shape and a surface area of ; it is characterized by a limestone dome on the summit, buried beneath sediments; in turn a volcanic hill i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Guyot In marine geology, a guyot (pronounced ), also known as a tablemount, is an isolated underwater volcanic mountain ( seamount) with a flat top more than below the surface of the sea. The diameters of these flat summits can exceed .Guyot ''Encyclopædia Britannica Online'', 2010. Retrieved January 14, 2010. Guyots are most commonly found in the Pacific Ocean , but they have been identified in all the oceans except the Arctic Ocean . History Guyots were first recognized in 1945 by H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Manganese Crust Manganese is a chemical element with the symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. Manganese is a transition metal with a multifaceted array of industrial alloy uses, particularly in stainless steels. It improves strength, workability, and resistance to wear. Manganese oxide is used as an oxidising agent; as a rubber additive; and in glass making, fertilisers, and ceramics. Manganese sulfate can be used as a fungicide. Manganese is also an essential human dietary element, important in macronutrient metabolism, bone formation, and free radical defense systems. It is a critical component in dozens of proteins and enzymes. It is found mostly in the bones, but also the liver, kidneys, and brain. In the human brain, the manganese is bound to manganese metalloproteins, most notably glutamine synthetase in astrocytes. Manganese was first isolated in 1774. It is familiar in the laboratory in the form of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]

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