Illustration of how plates move across the Earth. The motion of (almost) rigid surface portions on a sphere can be described by a rotation around a rotation axis, which cuts the surface at the so-called Euler pole. This relative motion of the plates is mainly accommodated by localised deformation at plate boundaries. Three general types of plate boundaries exist: transform plate boundaries allow the plates to move alongside each other, and convergent and divergent plate boundaries allow for plate destruction and creation, respectively. Transform and divergent plate boundaries are almost straight features, but spreading ridges are generally offset laterally by transform intersections. Subduction zones are usually arcuate (i.e., concave toward the upper plate) due to interaction with mantle flow. Variations of these plate boundaries exist depending on the given combination of upper and lower plate nature (i.e., continental or oceanic).
- Creator: Fabio Crameri
- This version: 23.08.2021
- License: Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
- Specific citation: This graphic by Fabio Crameri from Crameri et al. (2019) is available via the open-access s-Ink repository.
- Related reference: Crameri, F., G.E. Shephard, and C.P. Conrad, (2019), Plate Tectonics☆, Reference Module in Earth Systems and Environmental Sciences, Elsevier, doi:10.1016/B978-0-12-409548-9.12393-0
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199 views (since Nov. 2022)
This is very good and something I have tried to get over to teachers et al. for many years – you might like to watch https://www.youtube.com/watch?v=nG31MRFpcNQ
where I demonstrate plate movement on a sphere using an orange
Your post has me thinking of amending the paper I am writing so I congratulate you on this