Question

16. Which process(es) cause(s) thick sediment layers to accumulate along the boundaries of continental

and oceanic plates?
O A. Marine transgressions
O B. Subduction
O C. Marine regressions
O D. Glaciation
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Answer 1

A. Marine transgressions

Step-by-step explanation:

During this slow process of sea level rise called a marine transgression, thick, successive layers of sediments deposit along the edge of the continent.

Answer 2

The process of thick sediment layers to "accumulate" along the "boundaries of continental and oceanic plates" is called Subduction.

Explanation:

• During a marine transgression, sea level raises high compared to land level resulting in floods. These are triggered during climate changes, ice-age, isostatic movements.

• Subduction occurs at the tectonic plates where one plate is moves under another forcing to sink into Earth’s mantle due to the gravitational force.

• The plates are continental and oceanic in the zone of lithosphere. The rate of subduction is usually seven to 8 centimetres per year.

• Marine regressions are opposite to transgressions where sea levels fall compared to land levels.

• Glaciation is the interval of time within an ice-age. The current glacier period is of Holocene.