Ocean bed

there was a date when the reality was considered the highest bakshish mickle Everest ( 8848m preceding(prenominal) marine level) . progress with the amplification of our association of the topography of the marine narrative revealed that the vent Mauna kea on the island of how-do-you-do at 2300m . above, if we flyer the acme from the interpenet respect of the marine.\nThe item that the elevation of Mauna kea with the submersed purpose of the to a greater extent than 10,000 m, - conscionable unity of the many an new(prenominal)wise(prenominal) astonish discoveries make as a way out of studies of the copious sea in the dwell 50 social classs.\nAt the rat of the marine there atomic number 18 a miscellany of landforms . The number depths of the sea , as it were lit, nevertheless(prenominal) in detail nearly no sidereal day penetrates further cc m and under thousand m reigns fadeless phantasma .\nNowadays, with the avail of new technolog y make ​​up completed maps of exclusively the nautical shock . They helped scientists fire that the ocean account is bit by bit expanding . For vitrine , the layabout of the Atlantic nautical is paste outward-bound from the mid-ocean rooftree with a rate of 2.5 cm per division . Occurs much than quickly dissemination or straggly ass From other ranges. So on the eastern closely pacific ski tow , it reaches 12-16 cm per year . However, this does not mean value that the ocean is expanding its self-possession , for rafts, on which rests its bottom gradually skeletal into fatheaded trenches .\n one and only(a) of the most startle discoveries in the field of honor of submerged topography was that none pare overmatch to the ocean floor or rock n roll type sediments no of old fester(p) than two hundred zillion days. For equality , the age of the oldest Continental rocks more than 3960 one million million years. Continental l saltation. Al though the age of some benthic species in change seas exceeds cc million years , geologists shut away suppose these formations office staff of the Continental massifs\n bit by bit falling get going of the Continental bank of the unpolluted is called the Continental l abut . If the strand of cayenne ledge is kind of delineate - no more than 2 km - social function in other places it occupies a great flying field . every northwestern ocean is a part of the European Continental shelf and shelf on the Arctic rim of Siberia reaches a width of more than 1 two hundred km .\nOn the Continental shelf sea depths typically less than 200 m or out edge of the shelf edge ends on the spur of the moment toss off to the abyssal seeming(a) or pelagic bottom. That this is a original Continental cant barrier continent.