| Themes > Science > Earth Sciences > Geology > Earth > The Story Of Plate Tectonics > Plate Tectonics > Understanding Plate Motions > Convergent boundaries > Plate-boundary zones |
Not all plate boundaries are as simple as the main types discussed above. In some regions, the boundaries are not well defined because the plate-movement deformation occurring there extends over a broad belt (called a plate-boundary zone). One of these zones marks the Mediterranean-Alpine region between the Eurasian and African Plates, within which several smaller fragments of plates (microplates) have been recognized. Because plate-boundary zones involve at least two large plates and one or more microplates caught up between them, they tend to have complicated geological structures and earthquake patterns. |
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