nalyne the images above, from the South Rim of the Grand Canyon, made of a Permi
ID: 116354 • Letter: N
Question
nalyne the images above, from the South Rim of the Grand Canyon, made of a Permian calcarenite (sand-sired fosailifereous limestone) near Grand Canyon Village. The edge o the canyon here is )called the Kiabab Limestone. It is about 270 milion years old Horn corai ome of the beds in the outcrop are cross-bedded. Draw an arrow on the picture to show the direction that the 1. Notice that of water moved here to make this cross bedding Refer to FIGURE 6.12 as nceded. 2. Which kind of cross bedding is this? (FIGURE 6.12) 3. REFLECT &DiSCUSS; DISCUSS Describe (as well as you can) what che environment was like here about 270 million years ago and the evidence and logic chat you used to reach your conclusion. 183Explanation / Answer
1.The zoomed cross beded rock shows that the current direction is from right to left as per the page because in the image we have seen that the crossings are higher on the right and lower on the left which indicates the water has flown from right to left as per the page .
2.As discussed above the cross bed is due to current water flow and the water flow direction is from right to left so it is normal current cross bed .
3.The environment was shallow marine at 270ma because we can see cross bed very clearly with marine fossils that means the rock was bineath water and that was marine water as marine fossil is found .
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