42383
Description
Mind Map by Marni Quinn, updated more than 1 year ago
|
Created by Marni Quinn
about 11 years ago
|
|
tensional margins
or constructive
boundarys
- The plates are moving apart
- Because of convection currents
- magama rises from the mantle
- The magama comes to the
surface of the earth
- This is accompanied by earthquakes
- When it solidifies on the
surface it forms a new layer
of igneous rock
- This process is repeated
many times over a long
period of time
- Eventually the rock
builds up to form a
volcano
- Eventually the rock
builds up to form a
volcano
- This process is repeated
many times over a long
period of time
- This is accompanied by earthquakes
- The magama comes to the
surface of the earth
- Because of convection currents
- Constructive
boundaries tend to be
found under the sea
- E.G. the mid atlantic ridge
- Here, chains of underwater
volcanoes have formed along the
plate boundary.
- One of these
volcanoes may become
so large that it erupts
out of the sea to from a
volcanic island
- E.G. surtsey
and the
westman
islands near
iceland
- E.G. surtsey
and the
westman
islands near
iceland
- One of these
volcanoes may become
so large that it erupts
out of the sea to from a
volcanic island
- Here, chains of underwater
volcanoes have formed along the
plate boundary.
- E.G. the mid atlantic ridge
Want to create your own Mind Maps for free with GoConqr? Learn more.