Reference no: EM133591744

Question: As the river is starting to cut a canyon, what layer (sedimentary strata) does it first have to erode? What strata has been the last one to have been eroded? Reminder of names: The light blue colored Kaibab Limestone strata is at the top. The tan-colored Tapeats Sandstone is at the bottom. The bright yellow is the Coconino Sandstone. HINT #1: if you were going to saw through these rocks, which layer would you have to saw first? HINT #2: The sequence is the opposite of the age of the strata Group of answer choices The river eroded the Tapeats sandstone first and the Kaibab Limestone last I do not have sufficient information to answer this question. The river eroded the Coconino Sandstone first, then Tapeats, and Kaibab The river eroded the top (Kaibab Limestone) first and the bottom (Tapeats Sandstone last)