Definition

Noun: - A large rock that has been transported from its original location to a distant place by the movement of a glacier.

Usage

• This term is used specifically in geology and physical geography to describe a landform feature created by glacial activity. It refers to the boulder itself, emphasizing its mode of transport.
• It is a compound noun. The word "glacial" modifies "boulder" to specify the type and origin.

Examples

• The glacial boulder in the middle of the field is a remnant of the last ice age.
• Geologists study glacial boulders to trace the historical flow paths of ancient glaciers.

Advanced Usage

• Erratic (or Glacial Erratic): This is a more precise and commonly used synonym in geological terminology. A "glacial boulder" is a type of erratic.
  • The large granite rock is a famous glacial erratic deposited thousands of years ago.

Variants and Related Words

• Erratic (noun): A piece of rock that differs in size and type from the native rock where it rests, having been transported by glacial ice. This is the primary technical synonym.
• Glacial erratic (noun): The full compound term, identical in meaning to "glacial boulder."

Synonyms

• Erratic
• Glacial erratic
• Ice-transported boulder

Related Terms and Concepts

• Glacial deposition: The process by which a glacier drops or deposits material it was carrying, including boulders.
• Moraine: A mass of rocks and sediment carried down and deposited by a glacier, which may contain many glacial boulders.

Noun

1. a boulder that has been carried by a glacier to a place far distant from its place of origin