125 MYA: Pangea is split into Northern and Southern halves Ca. 125 MYA • Northern continent is Laurasia o North America, Greenland, Europe, Asia (minus India) • Southern Continent is Gondwana o South America, Africa, Antarctica, Australia • Adaptive radiation of angiosperms underway o Angiosperm-flowering plants o Important for later primate evolution (fruits/insects) • Marsupials have recently evolved Events…
1. Evidence for the rearrangement of crustal plates and continental drift indicates that Australia was once part of an ancient super continent…
Hundreds of millions of years ago, all the continents on Earth were connected to form a giant…
Chunks of terrain broke off from Pangaea, opening up the oceans, and forming the land masses we know today. More continental activity formed mountain ranges, but after the Great Ice Age the land was depressed and opened up much of the lakes and rivers we know today. - 225 MYA to 2 MYA, 10,000 YA…
* Wanted to travel far east to china and india from Europe for spices, silk, rice, medicines, animals, gold, gunpowder, & dynamite…
Alfred Crosby, the historian mentioned earlier, argues an incredibly valid point. Since Pangaea did exist in an earlier time, it’s important to know that the areas that are now hours away on a 200mph plane were once reachable in a two hour rowboat ride. However, this had not been possible for centuries and millennia. By now, any contact had before Pangea broke apart was long forgotten. The continents have, at this point in time, been isolated for periods beyond recollection of time. But with Christopher Columbus’ discovery of the new world and the curiosity of new explorers, exchange soon began to take place. Resources that hadn’t been shared for ten, twenty, thirty generations were now being exchanged once again. As Crosby said, the “seams of Pangaea” began to be re-knitted, because connections through ideas, religion, and resources were at last…
Plate tectonics have played a major role in the history of the Earth. All seven continents are where they are today due to the movement of plate tectonics. These seven continents were one big supercontinent called “Pangea” about 200 million years ago before breaking apart. The three different types of plate boundaries are convergent, divergent, and transform. These plate boundaries form due to the earth’s outer shell called the lithosphere having multiple plates moving around each other within the earth’s surface, allowing them to collide, separate, or slide past each other.…
The plate-tectonic theory plays a huge part in the beginning years and it tells us that continents as well as ocean floors have rigid plates in the lithosphere and these plates slide over deeper rock in the asthenosphere. The movement of these plates causes breaking and colliding across the globe and this is what in fact formed North America due to all the collisions and then welding together of many smaller continents and some island arcs during the Precambrian time.…
into the land creature of a frog over the last 3 billion years a lot of…
The Earth is a little over 4.5 billion years old, its oldest materials being 4.3 billion-year-old zircon crystals. Its earliest times were geologically violent, and it suffered constant bombardment from meteorites. When this ended, the Earth cooled and its surface solidified to a crust - the first solid rocks. There were no continents as yet, just a global ocean peppered with small islands. Erosion, sedimentation and volcanic activity - possibly assisted by more meteor impacts - eventually created small proto-continents which grew until they reached roughly their current size 2.5 billion years ago. The continents have since repeatedly collided and been torn apart, so maps of Earth in the distant past are quite different to today's.…
In 1912, The Theory of Continental Drift was intensively developed by Alfred Wegener, who claimed that the world was made up of a single gigantic supercontinent named Pangea since the Permian period, 250 million years ago. It began forming at the beginning of the Carboniferous period, 365 million years ago, when Gondwana collided into Laurussia producing the Appalachian mountain belt in eastern North America and closing in Paleo-Tethys Ocean and modern landmass became exposed to air. Alexander Du Toit then suggested that 145-200 million years ago, in the middle Jurassic Period, Pangea…
The world was just a ball of ocean. It was the beginning of a beginning. Phoebgous was the creator of the world as we know it. Our planet earth took one million years to evolve into what it is. Phoebegous wanted to create a world of living creatures, he was very determined to make it work! So he inaugurates the world. He drops seeds in the ocean which slowly forms into islands and continents and conveniently creates all of our naturals. Like plants, mountains, ponds, etc. Though, there is a problem in Phoebegous’s creation. All of the continents are piled together in one spot.…
In 1915 the first edition of The Origin of Continents and Oceans, a book outlining the Continental Drift theory of Alfred Lothar Wegener, a German meteorologist, was published; expanded editions were published in 1920, 1922, and 1929. About 300 million years ago, claimed Wegener, the continents had formed a single mass, called Pangaea (from the Greek for "all the Earth"). Pangaea had split, and its pieces had been moving away from each other ever since. Wegener was not the first to suggest that the continents had once been connected, but he was the first to present extensive evidence from several fields. He was subsequently proved right, although he was wrong in one respect; the continents don't drift on their own, they move as part of much larger "plates" of the Earth's surface, much of which is ocean floor. Wegner's hypothesis stated that Earth's continents were once joined in a single landmass and gradually moved or drifted apart. Yes, that and he also provided information showing it, such as fossils of the same plants and animals living on different continents. Many people during his time didn't believe him. Just after his death in 1930 did people begin to accept the theory of continental drift. To support his theory he had the evidence of how the coastlines of North America and South America fit together with that of Europe and Africa. (That was too much to be just coincidence.) He found rocks and fossils on opposite sides of the Atlantic that correlated (matched up) if the continents were together. He also found climatologically evidence (in particular glacial erosion patterns) that could only logically be explained if the continents were…
Pole positions from many ancient rocks do not coincide with the position of the present pole. This could be because the rock has stayed in the same position and the pole has moved or it could be because the rock has moved taking its ancient pole position with it and so giving the false impression that the pole has moved. Study of rocks of the same age from different continents often give different pole positions. This means that the continents have moved over the surface of the Earth because different pole positions cannot exist at the same time and a single pole position can only be obtained by moving the…
Atlas then started pulling things out a small bag that he contained around his waist. He pulled out things that looked like little mountains. Atlas then threw the mini mountains to the floor and Poof Mountains transformed bigger out of nowhere. Then came the oceans, volcanoes, and at last the jungles. He then decided that he wanted one big continent but after he saw the result he didn’t like it so he clapped and then the big continent broke creating 7 different continents that started drifting apart from each other.…