boulder clay

• Término geológico para un depósito glacial no estratificado compuesto de arcilla mezclada con cantos rodados y grava, formado bajo capas de hielo.

A geological term for an unstratified glacial deposit consisting of clay mixed with boulders and pebbles, formed beneath ice sheets.

1. Glacial depositC1formal

   A type of unstratified glacial till consisting of clay, sand, gravel, and boulders, deposited by glaciers.

   Till glaciar

   • The valley floor is covered with boulder clay left by the last ice age.
   • Geologists studied the boulder clay to understand glacial movement.
   • Boulder clay often contains a mix of rock types from distant sources.