Boundaries. The western edge of the African Plate is a divergent boundary with the North American Plate to the north and the South American Plate to the south which forms the central and southern part of the Mid-Atlantic Ridge.
What type of boundary separates the African Plate and South American Plate?
Mid-Atlantic Ridge. The North American and Eurasian Plates are moving away from each other along the line of the Mid Atlantic Ridge. The Ridge extends into the South Atlantic Ocean between the South American and African Plates.
What type of boundary is between Australian Plate and African plate?
Orogenic belts. The most dramatic orogenic belt on the planet is the one between the Indo-Australian Plate and African Plate on one side (to the South) and the Eurasian Plate on the other side (to the North).
What are the 4 types of plate tectonics?
There are four types of boundaries between tectonic plates that are defined by the movement of the plates: divergent and convergent boundaries, transform fault boundaries, and plate boundary zones.
Did the South American plate and African plate moved apart suddenly or gradually?
Students figure out: The South American and African plates moved apart as a divergent boundary formed between them and an ocean basin formed and spread. … Students figure out: The Mesosaurus fossils moved apart gradually over tens of millions of years.
What are the three types of plate movements called?
The movement of the plates creates three types of tectonic boundaries: convergent, where plates move into one another; divergent, where plates move apart; and transform, where plates move sideways in relation to each other.
What two interacting plates from the transform fault boundary?
The collision led to the subduction of the Farallon plate underneath the North American plate. Once the spreading center separating the Pacific and the Farallon plates was subducted beneath the North American plate, the San Andreas Continental Transform-Fault system was created.
Does Australia sit on a tectonic plate?
Since Australia sits on top of a very stable because geologically old continental landmass in the middle of a tectonic plate (the Australian Plate) with no major active faults, it has far fewer quakes than areas near plate boundaries or major fault lines. Where do earthquakes occur in Australia?
What are the two main types of tectonic plates?
Tectonic plates are pieces of Earth’s crust and uppermost mantle, together referred to as the lithosphere. The plates are around 100 km (62 mi) thick and consist of two principal types of material: oceanic crust (also called sima from silicon and magnesium) and continental crust (sial from silicon and aluminium).
What is the most dangerous tectonic plate?
Since earthquakes also trigger tsunamis, it is fair to say they give floods fierce competition for the world’s deadliest natural disasters. The San Andreas Fault, where the Pacific Plate slips alongside the North American Plate, runs through California and is one of the most famous plate boundaries.
What causes the plates to move?
The heat from radioactive processes within the planet’s interior causes the plates to move, sometimes toward and sometimes away from each other. This movement is called plate motion, or tectonic shift.
How did the Mesosaurus fossil on the South American plate and African plate get so far apart?
How did the Mesosaurus fossils on the South American Plate and African Plate get so far apart? Earth’s plates travel at a rate too slow to be experienced by humans. It takes a long time for Earth’s plates to travel great distances. The Mesosaurus fossils moved apart gradually over tens of millions of years.
How fast is South America moving away from Africa?
The two continents are moving away from each other at the rate of about 2.5 centimeters (1 inch) per year. Rift valleys are sites where a continental landmass is ripping itself apart. Africa, for example, will eventually split along the Great Rift Valley system.
What happens with the plates and the mantle when two plates move toward each other?
At convergent plate boundaries, oceanic crust is often forced down into the mantle where it begins to melt. Magma rises into and through the other plate, solidifying into granite, the rock that makes up the continents. Thus, at convergent boundaries, continental crust is created and oceanic crust is destroyed.