#3162: Heart Mountain

XKCD comic, described below.
Transcript
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[Cueball is on the left, Ponytail is facing him from the right.]

Cueball: We haven't checked in on the Geology Department for a while. I wonder if they're doing okay.

[Ponytail is walking to the right.]

Ponytail: I'll go see what they're up to.

[Ponytail opens a door to a room. White Hat, Megan, and another Cueball are looking at a chart on the wall, and the other Cueball is pointing at it. Most of the chart is illegible, but near the top it says "90 MPH", and there's a diagram of geologic strata.]

Cueball: 49 million years ago, Heart Mountain, Wyoming slid sideways 15 miles like a giant stone hovercraft.

[Ponytail walks back to the Cueball from the first panel.]

Ponytail: ... They're not okay.

Voice from off the right side of the panel: Hey, you come up with a better explanation!


(Sourced from explainxkcd.com)

Title text:Even geology papers about Heart Mountain are like, "Look, we all agree this 'volcanic gas earthquake hovercraft' thing seems like it can't possibly be right, but..."


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