Sea Floor Scraping

Fisheries across the world are a shade of their former abundance.

Sea floor scraping.

The more intensive types of deep sea mining involve actually removing parts of the seabed or seamounts which would kill any life living there and would take decades at the very least for the. Seafloor spreading is a geologic process where there is a gradual addition of new oceanic crust in the ocean floor through a volcanic activity while moving the older rocks away from the mid oceanic ridge. Ships above will draw thousands of pounds of sediment through a. Seafloor spreading definition a process in which new ocean floor is created as molten material from the earth s mantle rises in margins between plates or ridges and spreads out.

The mid atlantic ridge for instance separates the north american plate from the eurasian plate and the south american plate from the african plate. Advances in bottom trawling technology have given commercial fishing boats access to the sea floor where unknown species have been making a living for eons march 25 2011 dear earthtalk. We overfish destroy habitat with sea floor scraping trawlers and toss out the less valuable creatures unfortunate enough to have. Seafloor spreading is a process that occurs at mid ocean ridges where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.

Seafloor spreading theory that oceanic crust forms along submarine mountain zones known collectively as the mid ocean ridge system and spreads out laterally away from them. The east pacific rise is a mid ocean ridge that runs through the eastern pacific ocean and separates the pacific plate from the north american plate the cocos plate the nazca plate and the antarctic plate. Their collection vehicles will creep across the bottom in systematic rows scraping through the top five inches of the ocean floor. Seafloor spreading occurs along mid ocean ridges large mountain ranges rising from the ocean floor.