The rocks were getting older and older, so they couldn't withstand the pressure and broke!
Li Du had been observing the process and witnessed a small volcanic eruption.
It was a bit of an exaggeration to say that water vapor erupting from the ground was much worse than volcanic eruptions, but the two were essentially the same, and Li Du was right to think so.
A strong stream of steam pushed away from the broken rocks and burst out like lightning.
The steam stream itself was very hot, and it was well known that the highest temperature of water at atmospheric pressure was 100 degrees Celsius and above that, it became water vapor.
However, the pressure on the ocean floor was strong, and these subsurface steam flows had previously accumulated in the rock formations, causing more pressure and temperatures higher than 100 degrees Celsius.
