- published: 21 Feb 2009
- views: 76732
Earth's landmasses were not always what they are today. Continents formed as Earth's crustal plates shifted and collided over long periods of time. This video shows how today's continents are thought to have evolved over the last 600 million years, and where they'll end up in the next 100 million years. Paleogeographic Views of Earth's History provided by Ron Blakey, Professor of Geology, Northern Arizona University.
This animation shows the plate tectonic evolution of the Earth from the time of Pangea, 240 million years ago, to the formation of Pangea Proxima, 250 million years in the future. The animation starts with the modern world then winds it way back to 240 million years ago (Triassic). The animation then reverses direction, allowing us to see how Pangea rifted apart to form the modern continents and ocean basins. When the animation arrives back at the present-day, it continues for another 250 million years until the formation of the next Pangea, "Pangea Proxima". This question often come up. " Why dont you show East Africa rifting away from the rest of Africa?". Here's why: - Often, oceans open around a three-armed rift system called a “triple junction”. Only two arms of a triple juncti...
The Earth is formed by accretion of spatial particulates and large masses and eventually forms an outer crust. Video follows with speculation of early plates and land masses and their movement through time. **Clip is from National Geographic**
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