Where does “пластовой” come from?

пластовой (Russian) comes from Russian пласт, from Old East Slavic пластъ, from Proto-Slavic plastъ — layer.

пластовой (Russian): layer, stratum

Definitions

  1. layer, stratum

Ancestry of “пластовой”, step by step

StepLanguageWordMeaning
1Russianпластlayer, sheet, stratum; bed
2Old East Slavicпластъthin layer
3Proto-Slavicplastъlayer
Every word from Proto-Slavic plastъ →Every word from Old East Slavic пластъ →Every word from Russian пласт →