boulder clay

1. 1.

   unstratified soil deposited by a glacier; consists of sand and clay and gravel and boulders mixed together

   Synonymstill

   Broadersoil

Questions about boulder clay

What does boulder clay mean?

boulder clay means "unstratified soil deposited by a glacier; consists of sand and clay and gravel and boulders mixed together".

What is another word for boulder clay?

Close synonyms include till. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is boulder clay a common word?

boulder clay is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.