Question

why were magnetic patterns of the ocean floor puzzling to scientists? they are not symmetrical they showed alternating bands of normal and reversed magnetism they indicated that all ocean rocks have reversed magnetism

Explanation:

Magnetic patterns of the ocean floor showed alternating bands of normal and reversed magnetism. This was puzzling as it was not initially understood. Symmetry was present (parallel to mid - ocean ridges). And it was not that all ocean rocks had reversed magnetism.

Answer:

they showed alternating bands of normal and reversed magnetism