I sketched a 35 page comic that involves San Andreas and Cascadia having to fight off an evil fault avatar from Venus that ended his planet's plate tectonics, and now intends to do the same for Earth. I don't think I will be able to color every panel, some will probably have to be monochrome. But these two panels here in particular I really wanted to color.
Basically Cascadia appears to defeat the evil fault by subducting him, but the fault manages to bore his way out of Cascadia's stomach. Cascadia is left with a big gaping hole in his belly that's erupting lava straight from the mantle everywhere, and combined with the wounds he got from the process of getting the fault into a weakened position where he could be subducted, he's in too much pain to continue fighting. I imagine dikes are like Cascadia's veins, so when wounded he bleeds lava everywhere. I imagine his wounds "heal" by having the lava on the wound solidify into basalt scabs/scars.
San Andreas sees the injured Cascadia collapsing while failing to chase after the escaped Venusian villain, and offers to help him heal his wounds. Cascadia is very surprised by this, as he has definitely not done much to endear himself to San Andreas:
-from turbidite deposits we know when the Cascadai subduction zone has a megathrust earthquake, it usually triggers the northern San Andreas to rupture a few years later. Basically Cascadia just kind of breaks San Andreas' face when he gets mad.
-he subducted the Pacific-Farallon Ridge millions of years ago, who is essentially the equivalent of San Andreas' mom
San Andreas chooses to be the better man (fault?) and help Cascadia, because he's not really into destroying other faults like subduction zones do. However, he has mixed feelings on this, and clearly isn't especially happy about it.
I did not realize this at the time I sketched these drawings, but someone pointed out to me that San Andreas is actually being kind of snarky here. When he says he doesn't dispose of those who no longer serve a purpose, he's implying the wounded Cascadia who can't fight or subduct anymore has lost his purpose. It's a subtle jab that I must have subconsciously put in. I've also had recently people say San Andreas is snarky in some of the comics I've sketched and stories I've drafted, which was not a conscious intent, and I didn't notice this originally.
However I think it does make sense for him. He doesn't mean any harm most of the time, but he is dangerous, and is wary of others getting too complacent around him. So he acts a little bit insensitive to keep people on their toes...but not too insensitive.
Other notes:
-if you look closely some of Cascadia’s volcanoes are making teary-eyed pleading faces
-San Andreas’ body where it’s under the ground resembles the famous fault trace in the Carizzo Plane