 Discordant drainage patterns are classified into two main types: antecedent and superimposed, while anteposition drainage patterns combine the two.
<fluency>  Discordant drainage patterns are classified into two main types: antecedent and superimposed, while anteposition drainage patterns combine the two.
 Discordant drainage patterns are classified into two main types: antecedent and superimposed, while ante position drainage patterns combine the two.