In my story, a planet has
- About 1.5x to 2x the surface gravity of Earth
- Much more volcanic activity than Earth
- An extremely strong magnetic field (ideally at least 100x that of Earth. My research on the topic suggests this is somewhat possible, given the previously mentioned volcanic activity and a larger core size)
- An Earth-like atmosphere, though with stronger winds and more quickly-changing weather
That last one is due to the fact that it orbits a flare star, specifically 61 Cygni B (even more specifically, it orbits 0.45 AU away, toward the outer edge of the habitable zone). The strong magnetic field keeps the atmosphere from depleting, but the random flare activity causes wild swings in temperature. I'm still working out some details, so I could budge a bit on the gravity or atmospheric density, though the magnetic field obviously has huge implications for habitability, so it's non-negotiable.
My question is, what kind of visually interesting geological feature(s) could arise on such a planet that wouldn't happen on Earth? For instance, could the strong magnetic field cause any naturally-formed stone to be oriented along it? My guess is no, since the Curie temperature of rock is much lower than the temperature of lava, so the field wouldn't influence it until after it hardened. So what, if anything, could form on this planet that couldn't on Earth?