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Where does the oceanic crust begin?
The oceanic crust begins at the Mid-Ocean Ridge, where tectonic plates are moving apart, allowing magma to rise and solidify, forming new crust. This process of seafloor spreading creates the youngest oceanic crust at the ridge and older crust farther away from it.
What is the boundary between the oceanic crust and the continental crust known as?
The boundary between the oceanic crust and continental crust is known as the continental shelf. This is the shallowest part of the ocean that extends from the shore to the continental slope.
Which portion of the continental margin serves as a boundary between the oceanic crust and the continental crust?
The portion of the continental margin that serves as a boundary between the oceanic crust and the continental crust is called the continental shelf. This is the shallowest part of the margin, located between the shoreline and the continental slope.
What is the difference between continental shelf and slope?
The continental shelf is a flattish area which extends from the shore out into the ocean and is made of continental crust. This ends in a slope (the continental slope) which descends to the abyssal plane, which is made of oceanic crust.
Which type of crust typically comprises the continental margin?
The continental margin typically consists of a combination of continental crust that extends from the shoreline to the continental shelf's outer edge, where it transitions into oceanic crust of the ocean basin.
Where is the crust thicker - under the continental shelf or under the oceans?
The crust is typically thicker under the continental shelf compared to under the oceans. This is because the continental crust is made of lighter granite rocks which are less dense than the basaltic rocks of the oceanic crust, resulting in thicker continental crust.
The relatively steep transition between the continental shelf and the ocean basin is the continental slope?
Yes, the continental slope is the relatively steep slope that connects the continental shelf to the deep ocean floor. It marks the boundary between the continental crust and oceanic crust.
What does the continental margin consist of?
The continental margin is the zone of ocean floor that separates oceanic crust and continental crust. It accounts for 28% of all oceanic area.
What is between oceanic crust and continental crust?
Deep sea trenches, Mountain ranges, Volcanoes, and Earthquakes.
Does the continental slope drops downward dramatically and is it considered a boundary line?
Yes, the continental slope descends steeply from the continental shelf into the deep ocean floor. It marks the boundary between the continental crust and the oceanic crust.
What begins at the edge of the continental shelf?
the continental shelf-edge or shelf-break
The best approximation of the true outer boundary of the continents is the seaward edge of?
the continental shelf, which is an underwater landmass extending from the shoreline to the continental slope. This boundary represents the transition from continental crust to oceanic crust and generally marks the end of the continent.
