STATISTICAL PROBLEMS OF SAMPLE SIZE AND SPACING ON LAKE MICHIGAN BEACHES

Abstract

Beaches along Lake Michigan display a wide range in texture and composition. Some are composed of fairly uniform sand or gravel, others display an irregular mixture of both. Host beach sand is predominantly quartz with variable amounts of calcite, feldspar, and heavy minerals. Some gravel beaches are composed wholly of limestone or dolomite pebbles of local origin; in others the pebbles have the varied composition of their parent glacial materials.