What provides the best modern technique for obtaining seafloor bathymetry?

Multibeam provides the best modern technique for obtaining seafloor bathymetry, so why hasn't it been used for the entire ocean? It is too expensive, requiring many ships many years to survey the entire ocean.

Which one of the following would most likely be covered with thick turbidite layers?

Chapters 9-16

Question	Answer
Which one of the following would most likely be covered with thick turbidite layers?	deep-sea fan at the base of a continental slope
A flat, bench-like surface cut in rock along a coast is a ________.	wave-cut platform

Why isnt manganese mined on the seabed when there are abundant manganese nodules in some parts of the ocean floor?

Why isn't manganese mined on the seabed when there are abundant manganese nodules in some parts of the ocean floor? It is not economical to mine manganese nodules at present-day world prices for manganese and associated metals in nodules.

What kind of sediment is radiolarian chert quizlet?

Terms in this set (69) Radiolarian chert is a common sedimentary rock accreted along active margins in the circum-pacific. It is produced in the deep sea by the accumulation of siliceous radiolarian shells.

Why is it important to map the sea floor?

High-resolution seafloor mapping is a critical tool for regulating underwater resource exploration, extraction, and equipment, allowing us to decide what and where is safe. Seafloor maps also ensure that ships are able to safely maneuver around natural – and human-made – structures on the ocean bottom.

What is the purpose of bathymetry?

Bathymetric surveys allow us to measure the depth of a water body as well as map the underwater features of a water body.

Which one of the following would indicate that the land had been uplifted or that sea level had fallen?

Science 101 Final

Question	Answer
The presence of which one of the following would indicate that the land had been uplifted or that sea level had fallen?	elevated marine terrace
The movement of sand parallel to the shore ________.	all of these

Which one of the following structures is built to protect boats from large breaking waves?

Science Chapter 9-Oceans

Question	Answer
Which one of the following structures is built to protect boats from large breaking waves?	breakwater
The daily tidal range is GREATEST during	spring tide
Large estuaries are more common on a ____coastline.	submergent

What are the positives of deep-sea mining?

Undersea mining companies claim their deep-sea operations are less destructive than comparable land-based mining and are a good alternative to expanding mountaintop removal on land, but there is sparse evidence to support the claim.

How might large scale mining of manganese nodules from the ocean floor affect the environment?

The mining, pumping and cleaning of the manganese nodules creates noise and vibrations, which disturb marine mammals such as dolphins, and could force them to flee from their natural area. The sediment-laden water produced by the cleaning of manganese nodules is released into the sea from the ships.

Which scenario would generate Hydrogenous sediments to create sedimentary rocks quizlet?

Which scenario would generate hydrogenous sediments to create sedimentary rocks? –hot water leaving the oceanic crust and coming in contact with cold seawater at black smokers.

What marks the site where old oceanic lithosphere begins its descent into a subduction zone?

When old oceanic crust is descending into a subduction zone this forms an ocean trench. This means the answer is : A trench marks the site where old,…

Why is it important to map the ocean floor and more specifically the coastal regions?

A good understanding of the shape of the seabed and the nature of the coastline can help authorities to develop models that predict the impact of coastal inundation on low-lying areas. By identifying areas at risk, they can then take measures to protect communities.

What project is tasked with mapping the ocean floor?

The Seabed 2030 project was unveiled in 2018 and has been endorsed by the United Nations for the UN's 2021-2030 Decade of Ocean Science for Sustainable Development.

What is ocean bathymetry?

Bathymetry is the study of the "beds" or "floors" of water bodies, including the ocean, rivers, streams, and lakes.

What is seabed topography?

Seabed topography (ocean topography or marine topography) refers to the shape of the land (topography) when it interfaces with the ocean. These shapes are obvious along coastlines, but they occur also in significant ways underwater.

Which of the following is correct regarding a wave in the open ocean group of answer choices?

Which of the following is correct regarding a wave in the open ocean? Water particles move vertically in circular orbital motion.

Which one of the following would indicate that the land has been lifted or that sea level had fallen?

Science 101 Final

Question	Answer
The presence of which one of the following would indicate that the land had been uplifted or that sea level had fallen?	elevated marine terrace
The movement of sand parallel to the shore ________.	all of these

Which of the following structures is built off shore to reduce erosion from large breaking waves?

Submerged breakwaters Submerged breakwaters are built to reduce beach erosion. These may also be referred to as artificial "reefs." A breakwater can be offshore, underwater or connected to the land. As with groins and jetties, when the longshore current is interrupted, a breakwater will dramatically change the profile of the beach.

What is one way mining companies could help protect the environment as part of their business?

These practices include measures such as reducing water and energy consumption, minimizing land disturbance and waste production, preventing soil, water, and air pollution at mine sites, and conducting successful mine closure and reclamation activities.

Is deep-sea mining profitable?

Deep sea mining could be hugely profitable if scientists and engineers can assuage fears about environmental degradation. It's estimated that the Clarion-Clipperton Fracture Zone contains more commercially viable mineral and metal deposits than all of the surface-level deposits on Earth combined.

Why is deep-sea mining important?

Minerals found in the seabed, such as cobalt, manganese, nickel, and rare earth elements, are important components of smartphones, steel, and green technologies including solar cells, electric vehicles, and wind turbines. Some of these minerals are rare on land; deep-sea mining could provide a valuable source.

What is the purpose of deep-sea mining?

Undersea mining companies claim their deep-sea operations are less destructive than comparable land-based mining and are a good alternative to expanding mountaintop removal on land, but there is sparse evidence to support the claim.

Which type of sediment is more likely to be found at the bottom of the ocean?

Other biogenous sediments form as tiny shells sink to the bottom of the ocean. Because of differences in chemistry, seafloor sediments made of calcium carbonate most commonly form in shallower and warmer water. Seafloor sediments made of silica more often occur in deeper or colder water.

What resource is the most commonly sought after in terms of volume on the sea floor?

Deposits of petroleum and natural gas under the seafloor are the most valuable and sought-after fuels of the contemporary world economy. Shallow seas and small ocean basins, such as the South and East China seas, have notable reserves, but exploitation of some deposits has been hindered by territorial disputes.

What characteristic of a slab of oceanic lithosphere leads to the formation of deep ocean trenches instead of shallow trenches?

What characteristic of a slab of oceanic lithosphere leads to the formation of deep-ocean trenches instead of shallow trenches? Depends largely on its age and therefore its density (older = more dense) which results in a higher angle of subduction. Briefly describe how mountain belts such as the Himalayas form.

Which of the following ocean floor features is associated with trenches?

Ocean trenches are a result of tectonic activity, which describes the movement of the Earth's lithosphere. In particular, ocean trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet.

What are the benefits of mapping the ocean floor?

High-resolution seafloor mapping is a critical tool for regulating underwater resource exploration, extraction, and equipment, allowing us to decide what and where is safe. Seafloor maps also ensure that ships are able to safely maneuver around natural – and human-made – structures on the ocean bottom.

Why do we want to map the ocean floor?

Scientists can use information on the shape of the seafloor to understand a myriad of climate change processes, such as sea-level increases. Bathymetric maps also help researchers predict the path and strength of tsunamis and enable ecologists to better understand underwater ecosystems.