Which topographic feature is primarily formed by glacial erosion within a cirque?

💡 Explanation

When a glacier occupies a cirque, glacial erosion sculpts a bowl-shaped depression that can later hold meltwater because the ice scours the bedrock, thereby forming a tarn lake. Therefore, a tarn lake is commonly found within a cirque, rather than U-shaped valleys, hanging valleys, or arête ridges which require larger-scale glacial valley systems.

• Which mechanism increases earthquake frequency following large-scale reservoir impoundment near active fault lines?
• Which mechanism causes differential erosion rates along the walls of a fjord during glacial retreat?
• What amplified seismic event creates transoceanic tsunami waves following megathrust earthquakes?
• Which ecological pattern consistently arises adjacent arid coastal regions as persistent offshore winds drive coastal upwelling?
• Which phenomenon results from disruption of Hadley cell circulation patterns?
• Which process causes increased methane release from Arctic slopes experiencing thermokarst?