The "Basket of eggs topography" is a distinctive glacial landform characterized by an assemblage of drumlins. Drumlins are elongated, streamlined hills composed of glacial till, which is an unsorted mixture of clay, silt, sand, gravel, and boulders deposited directly by glacial ice. These features typically have a blunt, steeper end facing the direction from which the glacier advanced (stoss end) and a more gently sloping, tapered end pointing in the direction of glacial movement (lee end).

The formation of drumlins is attributed to the deposition and molding of glacial till beneath a moving glacier. As the ice flows, it sculpts the till into these characteristic shapes, often in swarms or fields. When viewed from above, these clusters of drumlins, with their varying sizes and orientations, resemble a basket filled with eggs, hence the descriptive term. This topography is indicative of past glacial activity and provides valuable insights into the direction and dynamics of ancient ice sheets. Such landscapes are commonly found in areas that were once covered by continental glaciers, such as parts of Ireland, North America, and Northern Europe.