Geo Reviewer Surface Water Practice Exam 2026 – Comprehensive Test Prep

The development of a rectangular pattern in geological features is typically associated with a series of joints in the bedrock. Joints are natural fractures or cracks in the rock that occur without significant displacement. When these joints form in a systematic way, often at right angles to each other, they create a grid-like framework. This organized structure influences how weathering, erosion, and hydrological processes occur, thereby contributing to the rectangular drainage pattern observed in rivers and streams.

In contrast, uniform sedimentary layers or flat-lying sedimentary strata do not inherently create the systematic jointing that leads to a rectangular pattern. While they may affect drainage patterns when influenced by other factors, they do not define the foundational structure in the same way joints do. High mountain ranges can lead to complex patterns due to their topography, but they are not directly responsible for creating a rectangular pattern of channels or drainage. Instead, they may lead to more irregular or radial patterns based on the relief and landscape formed by tectonic forces.