Testing out the new alpha release (0.0.14.18 in MC 1.12) and I noticed that while the variations of Marble and Limestone are still present, the raw/plain versions that generate in the world are no longer present. Is this intentional? I'm happy to grab a different mod to put them into the game if it was a decision due to duplication in a common mod, but it seemed odd that the chiseled versions still exist but no plain ones.
Thanks!

They definitely should still exist...listed as the "Raw" variant. Can you double check?

Okay, I am seeing that now. I lost my storage drawer full of the original versions and didn't scan the whole list of variants properly.
Am I correct to assume that previously generated chunks will now have air or will those auto-correct to the new "raw" variant? (Apologies for all the q's)

Previously generated? Generated when? The worldgen has used the raw variant for a good while now.

Worldgen is what I meant. I went from 0.13.15 to the new 0.14.18 so maybe I missed something inbetween. Thank you for your help.