1. a sedimentary rock formed from ancient glacial deposits, typically containing a mixture of clay, sand, gravel, and boulders
Usage: geological

Examples

• The geologist identified tillite formations that indicated glacial activity millions of years ago.
• Tillite deposits provide evidence of ancient ice ages in regions now located in warm climates.
• The rock sample contained typical tillite characteristics including unsorted sediments of various sizes.
• Scientists study tillite to understand past climate changes and glacial movements.
• The tillite layer revealed that glaciers once covered this area during the Permian period.
• Distinctive tillite formations can be found in several locations across the southern continents.