Although the Benthic Explorer crew had been eager to get home they’d paused long enough to make several passes over the mysterious mount. With the ship’s sophisticated sonar they did a cursory study of the guyot’s internal structure. To everyone’s surprise the results were as unexpected as the mountain’s presence. The seamount appeared to be a particularly thin-skinned, quiescent volcano whose liquid core was a mere four hundred feet beneath the ocean floor. Even more astounding was that the substance within the magma chamber had sound propagation characteristics identical to those of the Mohorovicic discontinuity, or Moho, the mysterious boundary between the earth’s crust and the earth’s mantle. Since no one had ever been able to get magma from the Moho, although both Americans and Russians had tried during the Cold War, Perry decided to go back and drill into the mountain in hopes that Benthic Marine might be the first organization to sample the molten material. He reasoned that the material’s analysis would shed light on the structure and perhaps even the origin of the earth. But now his Benthic Explorer ’s operations commander was telling him that the original seismic data might be wrong!

“The magma chamber may be empty,” Mark said.

“Empty?” Perry blurted.

“Well, not empty,” Mark corrected himself. “Filled with some kind of compressed gas, or maybe steam. I know extrapolating data at this depth is pushing ground-penetrating radar technology beyond its limits. In fact a lot of people would say the results I’m talking about are just artifact, sorta off the graph so to speak. But the fact that the radar data doesn’t jibe with the seismic worries me just the same. I mean, I’d just hate to make this huge effort only to get nothing but a bunch of superheated steam. Nobody’s going to be happy with that, least of all your investors.”