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supercontinent 'gondwanaland' forms (about 542 million years ago)

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supercontinent 'gondwanaland' forms (about 542 million years ago)

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the supercontintent known as 'gondwanaland' forms in the earth, which froms from the continents of australia, south america, africa, and antarctica.

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earth is divided into areas called plates, not continents

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earth is divided into areas called plates, not continents

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its the plates that move, and the continents can move with it. the continents don't move, its the plates. which is why when you go in the ocean, and go deeper and deeper all you will find is hard, solid rock.

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the mesosaur is now living (about 300 million years ago)

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the mesosaur is now living (about 300 million years ago)

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this is the start of the mesosaurus, when it once roams to land. the mesosaur is a swimming reptile that is very small. lived in gondwanaland.

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mesosaurus lived in gondwanaland by the parts of south america and africa.

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mesosaurus lived in gondwanaland by the parts of south america and africa.

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the mesosaurus lived in the continents of south america and africa. remember, the continents stood in the same areas meaning that they were near eachother and not the 7000+ miles away theya re today.

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the plates are sitting on soft, solid rock.

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the plates are sitting on soft, solid rock.

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the plates are sitting on soft, solid rock below called the mantle. which is why the plates move, this will be useful because it answers the question of WHY the plates are now in completely separate areas and not how they were when they were in gondwanaland.

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the supercontinent slowly moves its littler continents inside it away from eachother, being a divergent boundary.

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the supercontinent slowly moves its littler continents inside it away from eachother, being a divergent boundary.

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the continents inside gondwanaland are now separating, being a divergent plate boundary. however, since plate motion is so slow (being 2cm/year). the plates moving far apart from eachother can still be crossed in distance for the mesosaur

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how do we know it IS a divergent boundary?

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how do we know it IS a divergent boundary?

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this is because we found a mid-ocean ridge in between africa and south america. only divergent boundaries are only able to make mid-ocean ridges, other than convergent boundaries that make trenches.

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why can a divergent boundary only specifically make mid-ocean ridges?

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why can a divergent boundary only specifically make mid-ocean ridges?

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when plates move apart from eachother, there would be a gap between the two plates that lead to the mantle. the mantle would then rise up to get cooled down by the ocean, making new ocean floor.

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the mesosaurus species dies out completely (260 million years ago)

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the mesosaurus species dies out completely (260 million years ago)

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the mesosaurus species goes away, none are left to be found and they go extinct.

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supercontinent gondwanaland's inners separate into what we now know as africa, south america, antarctica, and australia.

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supercontinent gondwanaland's inners separate into what we now know as africa, south america, antarctica, and australia.

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the plates diverge and the supercontinent gondwanaland diverges completely. we know this from the mid-ocean ridge in between africa and south america. where new ocean floor was added from the mantle rising up and cooling down.

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mesosaurus fossils are found in the +7000 km apart continents of africa and south america. (now)

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mesosaurus fossils are found in the +7000 km apart continents of africa and south america. (now)

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today, these mesosaur fossils are found in the very far apart continents of south america and africa. this is because of the divergent plate boundary of the plates where africa and south america lay in.

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we found out how fast the rate of plates move

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we found out how fast the rate of plates move

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through the Global Positioning System (GPS) tracking. we found out that please move 2 cm per year.