Discordant

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