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2007 IUCN Red List – Search
Deep Benthic 11.1. Continental Slope/Bathyl Zone (200-4,000m) 11.1.1. Hard Substrate 11.1.2. Soft Substrate 11.2. Abyssal Plain (4,000-6,000m) 11.3. Abyssal Mountain/Hills (4,000-6,000m) 11.4. Hadal/Deep Sea Trench (>6,000m) 11.5. Seamount 11.6. Deep Sea Vents (Rifts/Seeps) 12. Marine Intertidal 12.1. Rocky Shoreline 12.2. Sandy Shoreline ...
iucnredlist.org

2007 IUCN Red List – Habitats Classification Scheme (Version 3.0)
Marine Deep Benthic 11.1. Continental Slope/Bathyl Zone (200-4,000 m) 11.1.1. Hard Substrate 11.1.2. Soft Substrate 11.2. Abyssal Plain (4,000-6,000 m) 11.3. Abyssal Mountain/Hills (4,000-6,000 m) 11.4. Hadal/Deep Sea Trench (>6,000 m) 11.5. Seamount 11.6. Deep Sea Vents (Rifts/Seeps) 12. Marine Intertidal 12.1. Rocky Shoreline 12.2. ...
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HMS Challenger
For thousands of years, it was thought that bottom of the ocean was a vast, unbroken plain that was flat and shapeless. But after hundreds of soundings taken in oceans around the world, it ... that the majority of the sea bed consisted of a vast, relatively flat plain just over two miles deep, which they called the abyssal plain. At the conclusion of Challenger’s voyage it was clear that the ...
extremescience.com

Ocean Geography | Geography of the sea floor
At the outermost edges of these shelves the sea floor slopes abruptly and steeply to the abyssal plain. Scientists believe that the continental shelves mark the true outline of the land forms that are ... a mile down. For many years, people thought that the bottom of the sea was a flat plain. Imagine the surprise when surveyors discovered there were entire mountains under the sea! Some of the sea ...
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Geological Makeup of Marine Environments - MarineBio.org
Most shelves have a width of approximately 80 km and can ... life due to the relative abundance of sunlight available in their shallow waters. In contrast, the abyssal plain has been described as a biotic desert. Shelves eventually become a source of fossil fuels if ...
marinebio.org

Marine Zones - MarineBio.org
Other Marine Zones The abyssal plain is a flat or gently sloping part of the ocean floor, reaching a depth between ... plants and animals falling from surface layers. The Pacific Ocean has the least number of abyssal plains, the direct result of sediments in submarine trenches surrounding the Pacific Ocean becoming trapped. ...
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Richard Nehring • The Coming Global Oil Crisis
The failures in Atwater are interesting but may be indicative of problems for that area yielding lots of hydrocarbons. And in southern Atwater, you are on the abyssal plain --structures as flat as a pancake with only one or two exceptions (which Shell owns now but hasn't done anything ...
oilcrisis.com

OSPAR / QSR 2000 Chapter 2 - Geography, hydrography and climate
The OSPAR area can be divided into three distinct geological regimes: the oceanic basin and the continental shelf, separated at the shelf break by the passive continental margin. In the deep ocean basin an abyssal plain extends either side of the Mid-Atlantic Ridge to the continental margins consisting of a 4 6 km thick basaltic basement ...
ospar.org

WWF - Deep sea ecology: seamounts
Some seamounts reach into surface, sunlit waters - or even break above the water to form islands - while others have their peaks a kilometre below the ocean surface. Teeming with life Unlike the continental slope and abyssal plain, deep-sea seamounts are densely inhabited. This is due to the currents of nutrient-rich water forced up their sides from ...
panda.org

WWF - Deep sea ecology: sea floor
Earth's surface. ... , and cold-water corals, which filter this detritus from the water. Detritus reaching the muddy abyssal plain is eaten by sea urchins, starfish, sea slugs, crabs, shrimp, worms, bottom-feeding fish, ...
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