Figure 4. Average height of rocks around the exterior, margin, and interior of Homestead hollow are 6 cm, 4 cm, and 1 cm, respectively. All rocks measured in the DEM are included in the average and the standard error is indicated (standard deviation N/square root of N) that indicates the relative differences in rock height between the three areas are significant (especially between the exterior and interior). Because the rocks around the exterior and margin are more exposed based on their greater size and relative relief, their values are emphasized in consideration of the average amount of eolian stripping that has occurred outside the hollow (Golombek, Warner et al, 2020; Grant et al., 2020; Warner, Grant, et al., 2020) and how much rock fragments may remain embedded in the remnant ejecta.