Sometimes, these old stories are so nuts you just have to shake your head.
Case in point: The Giant Bubble Threat, the first story from Mysteries of Unexplored Worlds #16.
They're going to send a big, big drill down to the center of the Earth, partly hoping to find oil and partly hoping to learn about the Earth's interior. You would not be well-advised to think they're going to find out things about boring geology.
All things considered, that's a pretty sparse drilling station.
Some question the drill's quality; Baylor tells them it can take anything he knows of that Earth can dish out, but that it's still a loss.
Important as the event of drilling one hundred miles down is, it isn't enough to garner international attention, though I suppose it is supposed to be the '60s...
Cue alarming event:
Uh-oh, looks like somebody's got gas.
No, seriously, there's a problem.
See, something is erupting from the-okay, I'm not going there.
Lava isn't blue and bubbly, dude. Guess again.
Well, I should have expected that.
And somehow, the bubbles are engulfing things and floating away with them.
Call in the army!
What can they do now?
Well, they can dynamite the hole shut. And for no apparent reason...
...the bubbles just kinda vanish.
And so do the things they engulfed. Holy cheese.
And after this and for all time, humanity lives in terror of digging up scary bubbles. No, really.
Having read a lot of these stories, this one is still one of the weirder ones...