U.S. Geological Survey

U.S. Geological Survey Open-File Report 95-0582, Geologic Characterization of Natural Aggregate--A Field Geologist's Guide to Natural Aggregate Resource Assessment

This publication is a guide to field geologists who are assessing
an area for potential sources of natural aggregate such as crushed
stone and sand and gravel. It gives guides to observations in the field,
summarizes relations between the geologic properties of rocks and sand
and gravel and their likely performance as an aggregate, and provides
information about specific physical and chemical properties important
to aggregate quality.

Originally published in 1995, this report is presented here in
Portable Document Format. Adobe Acrobat Reader 3.0™ is required
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For more information about this report contact William D. Heran at wheran@usgs.gov