Annular-drainage pattern

From WebRef.org
Jump to navigationJump to search

A drainage pattern in which streams follow a roughly circular or concentric path along a belt of weak rock, resembling in plan a ringlike pattern. It is best displayed by streams draining a maturely dissected structural dome or basin where erosion has exposed rimming sedimentary strata of greatly varying degrees of hardness, as in the Red Valley, which nearly encircles the domal structure of the Black Hills, SD. AGI
Source: Dictionary of Mining, Mineral, and Related Terms


Sponsor: Dragon Professional Individual is Here!