Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
지질학에서 부정합은 두 지층 사이의 불일치를 나타냅니다.jijilhakeseo bujeonghabeun du jichung saiui bulilchireul natanabnida.In geology, unconformability indicates the discordance between two strata.