What term describes accumulations of basaltic lava flows?

The term that describes accumulations of basaltic lava flows is indeed Oceanic Plateaus. These plateaus are formed from large volumes of basalt that erupt from volcanic activity, particularly during periods of significant volcanic activity associated with tectonic processes. The basaltic lava cools and solidifies, creating extensive flat areas that can rise significantly above the surrounding ocean floor.

Oceanic plateaus are typically characterized by their extensive, thick layers of basalt, which result from the relatively fluid and low-viscosity nature of basaltic lava. The eruption of such magma often occurs due to mantle plume activity or rifting processes. As a result, these features hold significant scientific interest in understanding tectonic and volcanic activity in oceanic environments.

In contrast, deep-ocean basins refer to the large, submerged regions of the ocean floor between continental margins and mid-ocean ridges. Abyssal plains are flat areas of the ocean floor found at great depths, typically between ocean ridges and continental slopes, and are formed by the accumulation of sediments rather than lava flows. The Coriolis Effect relates to the deflection of moving objects due to Earth's rotation and does not pertain to the geological formation of basaltic lava flows.