What striking geological disparity exists regarding maria coverage between the Near Side and the Far Side?

The near side has roughly 31% coverage, while the far side has only about 1%.

The surface composition of the two hemispheres shows a dramatic contrast, particularly concerning the dark, smooth plains known as maria, which are solidified ancient basaltic lava flows. The near side, visible from Earth, is characterized by extensive coverage, approximately 31% of its surface being covered by these maria, having filled massive impact basins. Conversely, the far side is overwhelmingly dominated by impact craters and highlands, resulting in only about 1% of its surface area being covered by these basaltic features. This disparity suggests differences in crustal thickness preventing widespread magma flow on the hidden face.