1. large rocks or boulders that have been transported and deposited by glacial ice, often found in locations far from their original source
Usage: geology

Examples

• The geologist studied the erratics scattered across the valley floor.
• These granite erratics were carried hundreds of miles by ancient glaciers.
• The park’s trail features several large erratics left behind by retreating ice sheets.
• Scientists can trace the path of glacial movement by mapping erratics.
• The massive erratic boulder seemed out of place among the local limestone formations.
• Field researchers collected samples from erratics to determine their origin.