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Overall, this is due to plate tectonics--the movement, creation, and destruction of lithospheric plates which float on the asthenosphere, with the associated volcanism, uplift, sinking, and mountain building.

Shaping Continents and Seas

The shape and location of the continents and islands are due to several related geologic processes, some of which occur extremely slowly:

  • Continental drift (combines landmasses, creates mountains and other landforms)
  • Volcanic activity (creates lava plains, islands, and volcanic peaks)
  • Weathering and erosion* (reduces mountains and hills, creates rivers, lakes, deltas)
  • Tides and currents (erode or create coastal landforms)
  • Air temperature and circulation (rain and ice can create glaciers or icecaps, which trap water and reduce sea levels)

*The process of sedimentation can form new layers of sedimentary and metamorphic rocks, which can be uplifted or eroded as well.

*The biological organisms of Earth can affect erosion and also the climate, which can athereby cause changes to the land and seas.
I think our planet's continents look the way they do today because of the oceans volcanoes spreading apart over time.

That's a start. The volcanoes are the effects more than cause.

The continents are vast rafts of (essentially) granite floating on the Earth's viscous Mantle, through a thinner, fractured, surrounding sea-floor crust.

These "tectonic plates" break and drift, driven by movements - probably convection-currents - in the Mantle, which is the bulk of the planet's volume.

The ocean crust thins and breaks, forming a line of extrusive, relatively docile eruptions and basaltic lava floods along the "mid-ocean ridge", and forcing the two parts of the plate apart, against the surrounding continents. E.g, Mid-Atlantic Ridge, Iceland as the Atlantic Ocean is still widening at about 20-25mm/year mean speed.

(Continents too can thin, rift and separate, as presently occurring in NE Africa.)

The ocean crust approaching a slower-moving continent is forced below it - subduction. It melts in the Upper Mantle to produce magma that slowly floats up through the continental crust to form either huge solid masses called "batholiths" or "plutons" below ground, or be expelled as lava in explosive eruptions. E.g. those of the "Pacific Ring of Fire"as the Pacific Ocean is closing.

Subduction is also responsible for the most destructive earthquakes, from the stick-slip action on the thrust-plane between continental and subducted sea-floor plates.

Eventually the continents collide, to buckle, fault and fold the continental crust and its sedimentary cover into mountains. E.g., Andes, Alps, Himalaya. The sedimentary rocks caught up in the process over the millions of years this all takes, are compressed and heated to form "metamorphic rocks".

So to summarise, the continents owe their shapes to Continental Drift - a continuous, continuing, breaking and colliding as the tectonic plates are shuffled around the planet.
because they were once connected, called "Pangaea"
Pangea, or giant land mast, caused our continents to look the way they do. But how? The continents slowly drifted a part.. Look at a map, you can see some continents could fit together.

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Billy Hagenes

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3y ago

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Why do our continents look like they do today?

The continents look the way they do today due to the movement of tectonic plates over millions of years. Plate tectonics have caused the continents to drift apart, collide, or slide past each other, leading to the current configuration. This process also influences the shapes of coastlines and mountain ranges.


Why do the continents look the way that they do?

The current shape and arrangement of continents is due to the movement of tectonic plates. Over millions of years, the plates have shifted, collided, and pulled apart, leading to the formation of the continents we see today. This process, known as plate tectonics, continues to shape the Earth's surface.


What did earths continents look like?

Approximately 300 million years ago, the Earth's continents were joined together in a supercontinent known as Pangaea. Over time, Pangaea split apart to form the continents as we recognize them today.


What was the name of the one super continent that theoretically split into today's continents?

The supercontinent that split into today's continents is called Pangaea. It is believed to have been a single landmass around 335 million years ago before breaking apart into the continents we have today.


What does the earth continents used to look like?

Approximately 335 million years ago, all the Earth's continents were joined together in a supercontinent called Pangaea. Over time, due to the movement of tectonic plates, Pangaea began to break apart, leading to the formation of the continents as we know them today.

Related Questions

Why do you think our plants continents look the way they do today?

The shape of the continents is mainly due to water erosion.


What layer of earth makes up these plates and what layer are the continents look the way they do today?

rocks


What layer of the earth makes up these plates and what layer are the continents look the way they do today?

rocks


Why do our continents look like they do today?

The continents look the way they do today due to the movement of tectonic plates over millions of years. Plate tectonics have caused the continents to drift apart, collide, or slide past each other, leading to the current configuration. This process also influences the shapes of coastlines and mountain ranges.


Why do the continents look the way they do today?

My opinion on this question is that its probably a pattern on earth. Maybe in millions of years the earth would look like pangea, then eventually back to how it is now and repeating.


How did earths continents look in dinosaur era?

Much different than they are today.


Do the continents will look the same way in million years as they do today?

Mostly. Although some positions will shift and Coastlines will change. However, it is not enough to be considered a difference.


Why do the continents look the way that they do?

The current shape and arrangement of continents is due to the movement of tectonic plates. Over millions of years, the plates have shifted, collided, and pulled apart, leading to the formation of the continents we see today. This process, known as plate tectonics, continues to shape the Earth's surface.


Why do your continents look like they do?

The shape of continents is the result of tectonic plate movement over millions of years. This movement causes landmasses to drift apart, collide, or slide alongside each other, shaping the continents as we see them today. Erosion and other natural forces also play a role in shaping the landforms on the continents.


What did earths continents look like?

Approximately 300 million years ago, the Earth's continents were joined together in a supercontinent known as Pangaea. Over time, Pangaea split apart to form the continents as we recognize them today.


Why does are planet's continents look the way they do today?

Continental Drift Their actual shapes are those of the Continental Slope outlines, but these generally and approximately follow the visible coasts at lesser or greater distances off-shore.


Why does the planets continents look the way they do today?

Continental Drift Their actual shapes are those of the Continental Slope outlines, but these generally and approximately follow the visible coasts at lesser or greater distances off-shore.