The adjective discordant ('conflicting, disagreeing, at variance') may describe: Earth science Discordant rock, one that cuts across the existing bedding: as in one of the main types of igneous intrusion, or as in the sedimentary clastic dikes Discordant strata, rock layers with mismatches in the geologic record Discordant coastline, when the bands of rock run perpendicular to the coast Discordant drainage pattern, where the pattern of rivers and streams does not correlate with the underlying geology Other uses Discordant, or dissonant, sounds, in music Discordant pair of observations, in statistics Discordant twins, in twin studies Serodiscordant relationship, where one of the partners is HIV-positive and the other is not See also Discordianism Discord (disambiguation) Dissonance (disambiguation)