* Oceanic and Continental Crust are Interconnected: Tectonic plates are large pieces of the Earth's lithosphere (crust and upper mantle). They are not simply "oceanic" or "continental." Many plates contain both types of crust, and some are primarily oceanic.
* Plate Boundaries are Complex: Plate boundaries are dynamic and constantly evolving. New oceanic crust is formed at mid-ocean ridges, and old crust is subducted beneath continents. This makes defining the exact number of plates difficult.
* Varying Definitions: Geologists may define plates differently based on their focus. Some may consider smaller microplates, while others may lump them together with larger plates.
Instead of a precise number, it's more accurate to think of the following:
* Major Plates: The Earth's lithosphere is typically divided into about 15 major tectonic plates, several of which are primarily oceanic (e.g., Pacific Plate, Nazca Plate).
* Microplates: Numerous smaller microplates also exist, some of which are primarily oceanic. These can be difficult to map and are constantly evolving.
Therefore, while there is no fixed number, it's safe to say that there are many tectonic plates that contain oceanic crust, both major and minor.
