You're asking about a cirque on Mount Rainier, which is a bowl-shaped depression carved by glacial erosion. While many glaciers on Mount Rainier have contributed to the formation of cirques, you need to specify which glacier you're interested in.

To help me answer your question, could you please provide:

* The name of the glacier you are interested in. For example, Emmons Glacier, Nisqually Glacier, or Carbon Glacier.

* Any additional context about the cirque, such as its location on the glacier or its specific features.

With more information, I can give you a more precise answer.