the image above shows part of the guadalupe mountains in the trans-pecos ecoregion of texas. the prominent peak is el capitan,one of the highest peacks in texas.the different elevations seen in the image are due to differences in erosion. rock that is easily eroded tends to wear down,resulting in lower-elevations areas. rock that is resistant to erosion tends to remain higher-elevations areas baces on this information, the rock of el capitan