11. However, he said the canal walls were made mostly of resistant rock and a collapse was unlikely. 12. Eroded monoclines leave steeply tilted resistant rock called a hogback and the less steep version is a cuesta. 13. These deltas eventually dried and were buried under subsequent sediments where they hardened into a layer of resistant rock . 14. The less resistant rock layers are mainly made up of shale, a softer rock that weathers and erodes more easily. 15. The glaciers, and later meltwater, wore away less resistant rock , leaving behind hills and ridges of the harder diabase and anorthosite. 16. "' Caprock "'or "'cap rock "'is a harder or more resistant rock type overlying a weaker or less resistant rock type. 17. The Rush Creek glacier split in two when it encountered the resistant rock of what is now known as Reversed Peak. 18. "' Caprock "'or "'cap rock "'is a harder or more resistant rock type overlying a weaker or less resistant rock type. 19. The gorge that Salem Creek flows through is lined with resistant rocks of the Catskill Formation and the Trimmers Rock Formation. 20. These barren block fields occur in periglacial environments where outcrops of resistant rock are exposed with a slope of less than 25?
