They should not overlap

Came here to report this same thing, and its nice to see that its a known bug. It also seems to happen consistently, as each ancient city I've generated while quark was installed has had the glimmering weald overlap with it.

This actually has a pretty big gameplay impact, as it results in much less sculk blocks spawning, lessening the threat of wardens immensely.

Included are some screenshots I took before I knew the issue was known, but I figured I'd include them anyway. These are both taken on the same seed (8512437680579507297) with the only difference being whether quark is installed.

• Latest.log: https://gist.github.com/Warhand/0e2ec24ce979f10433706480e0a9c84e

Vanilla 1.20.1 (Forge 47.2.17 with 0 mods)

Quark 4.0-411 (Zeta 1.0-16)

For anybody interested feel free to mess around on the snowcapped website here https://snowcapped.jacobsjo.eu/.

I've found these parameters to work ok-ish so will likely go with them for now.
Please let me know if you find some better ones. (temperature, humidity, continentalness, erosion, depth, weirdness in order)