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How do you use ocean trench in a sentence?
The ocean surface level drops over a deep ocean trench, where there is less mass to attract sea water. The plate carrying the Afro-Arabian continent began to be subducted beneath the oceanic crust of the Tethys at a deep ocean trench.
What are ocean trenches used for?
Ocean trenches are steep depressions in the deepest parts of the ocean [where old ocean crust from one tectonic plate is pushed beneath another plate, raising mountains, causing earthquakes, and forming volcanoes on the seafloor and on land.
What is an ocean trench short answer?
Ocean trenches are long, narrow depressions on the seafloor. These chasms are the deepest parts of the ocean—and some of the deepest natural spots on Earth. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench.
What is an example of an ocean trench?
Ocean trenches exist in all the world’s oceans. They include the Philippine Trench, Tonga Trench, the South Sandwich Trench, the Eurasian Basin and Malloy Deep, the Diamantina Trench, the Puerto Rican Trench, and the Mariana.
What is a sentence for Mid Ocean Ridge?
Examples of mid-oceanic ridges You can help! These mid-oceanic ridges are where new sea floor is constantly created through the up welling of new basaltic magma. With new sea floor being pushed and pulled out, the older sea floor slowly slides away from the mid-oceanic ridges toward the continents.
How many trenches are there in the ocean?
They are found on the oceanward side of island arcs and Andean-type orogens. Globally, there are over 50 major ocean trenches covering an area of 1.9 million km2 or about 0.5% of the oceans. Trenches are geomorphologically distinct from troughs.
How do you use mountain range in a sentence?
Examples of mountain range
- A mountain range divides the population into western and eastern sides.
- On the west side of the mountain range, a pattern of isolation by distance was detected.
- It is a most welcome contribution from a geologist who has spent many seasons working through much of the mountain range.
How is the word’trench’used in a sentence?
trench Sentence Examples Several soldiers gathered by the wall of the trench, looking out to see what was happening in front. Gabe rose and swirled on his trench coat. 168 His gaze dropped to the trench he had dug around the bush. A trench was dug three and a half feet wide, four feet eight inches deep, and eight feet long.
Where are some of the most famous ocean trenches?
Some of the most familiar ocean trenches are the result of this type of convergent plate boundary. The Peru-Chile Trench off the west coast of South America is formed by the oceanic crust of the Nazca plate subducting beneath the continental crust of the South American plate. The Ryukyu Trench, stretching out from southern Japan,
How are ocean trenches formed by the continental boundary?
Ocean trenches formed by this continental-oceanic boundary are asymmetric al. On a trench’s outer slope (the oceanic side), the slope is gentle as the plate gradually bends into the trench. On the inner slope (continental side), the trench walls are much more steep. The types of rocks found in these ocean trenches are also asymmetrical.
Why are ocean trenches the most hostile habitats?
Ocean trenches are some of the most hostile habitats on Earth. Pressure is more than 1,000 times that on the surface, and the water temperature is just above freezing. Perhaps most importantly, no sunlight penetrates the deepest ocean trenches, making photosynthesis impossible.