1. a sedimentary rock composed mainly of sand-sized grains of quartz or feldspar cemented together

Examples

• The ancient cliff was made of red sandstone.
• Workers quarried sandstone to build the cathedral.
• The sandstone formation showed layers from different geological periods.
• Many buildings in the city were constructed from local sandstone.
• The hiking trail wound through colorful sandstone canyons.
• Sandstone is softer than granite but harder than limestone.