The Capricorn plate is a proposed[clarification needed] minor tectonic plate lying beneath the Indian Ocean basin in the southern and eastern hemispheres.
| Capricorn plate | |
|---|---|
 | |
| Type | Minor (proposed) |
| Movement1 | north-east |
| Speed1 | 59 mm (2.3 in)/year |
| Features | Indian Ocean |
| 1Relative to the African plate | |
The original theory of plate tectonics, as accepted by the scientific community in the 1960s, assumed fully rigid plates and relatively narrow, distinct plate boundaries. However, research in the late 20th and early 21st centuries suggests that certain plate junctions are diffuse across several dozen or even hundreds of kilometres.[1]
The Capricorn plate is a relatively rigid piece of oceanic crust along the far western edge of the former Indo-Australian plate. The Capricorn plate was once joined with the Indian plate and the Australian plate to form the Indo-Australian plate, but recent studies suggest that the Capricorn plate began separating from the Indian and Australian plates between 18 million years ago and 8 million years ago along a wide, diffuse boundary.[2]
References
edit- ^ Royer, Jean-Yves; Gordon, Richard G. (August 1997). "The Motion and Boundary Between the Capricorn and Australian Plates". Science. 277 (5330): 1268–1274. doi:10.1126/science.277.5330.1268.
- ^ Gordon, Richard G. (March 2009). "Lithospheric Deformation in the equatorial Indian Ocean: Timing and Tibet". Geology. 37 (3): 287–288. Bibcode:2009Geo....37..287G. doi:10.1130/focus032009.1.
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