Here's how glaciers create these distinctive features:

* Erosion: Glaciers are powerful agents of erosion. As they move across the landscape, they scrape, scour, and pluck away rock and soil, carving deep valleys.

* U-shaped Profile: Unlike river valleys, which have a V-shaped profile, glacial valleys have a distinctive U-shaped profile due to the immense erosive power of the ice.

* Basins: As glaciers recede, they leave behind large, flat areas called basins. These basins often fill with water, forming lakes and other water bodies.

Examples of glacial valleys:

* The Finger Lakes of New York: These famous lakes are located in glacial valleys carved by the Wisconsin glaciation.

* Fjords in Norway: These steep-sided inlets are classic examples of glacial valleys that have been flooded by the sea.

* The Yosemite Valley in California: This iconic valley is a prime example of a U-shaped glacial valley with towering granite cliffs.

Let me know if you'd like more information on glacial erosion or specific examples of glacial valleys.