Which of the following is NOT one of the evidences put forth for moving ocean crust?

The correct choice highlights that tightly folded mountains are not evidence used to support the idea of moving ocean crust. Instead, this phenomenon is more indicative of tectonic activity related to continental collision and convergence, which results in mountain-building processes.

In contrast, the other options directly relate to the notion of sea-floor spreading and the dynamic nature of oceanic crust. The age of the ocean floor shows a pattern of younger rocks closer to mid-ocean ridges, supporting the idea that as new crust is formed, the older crust moves away. Magnetic striping provides evidence of past magnetic field reversals recorded in the ocean floor rocks, aligning with the concept of seafloor spreading. Finally, heat flow measurements suggest that heat emanates from mid-ocean ridges, indicating ongoing volcanic activity and new crust formation, further supporting the movement of ocean crust. Thus, tightly folded mountains, while significant in understanding tectonic processes, do not serve as evidence for the movement of oceanic crust.