GPH 112 42 Why the Grand Canyon is Grand Stage B

GPH 112 42 Why the Grand Canyon is Grand Stage B.Question 1 0.5 / 0.5 pts What is the formation and rock type that makes up the plateau (relatively flat) surface that surrounds the Grand Canyon on both the North Rim and South Rim? Brief Background setup for Question A1: These videos show the rim and plateau surface surrounding the Grand Canyon: 155D-451F-679C4406F71D1006 (Links to an external site.) & 155D-451F-6722A3EAFE93E679 (Links to an external site.) There are lots of sedimentary layers of Mesozoic age that used to be on top of this material. You can see these strata by visiting areas north of the Grand Canyon, such as Bryce and Zion National Parks, as illustrated below from (Links to an external site.) Hermit Formation – Shale Coconino Formation - Sandstone Tapeats Formation - Sandstone Correct! Kaibab Formation - Limestone Visitors to the Grand Canyon from wetter places with limestone, such as Kentucky, are often surprised to learn that the formation that makes the hard rim of the canyon is limestone. That is because limestone typically makes valleys in wetter climates. The reason is that limestone dissolves easily if there is a lot of water. However, in the dry climate of this region, limestone dissolves very slowly and tends to be less suspectible to rock decay that the other rock types (e.g. sandstone and shale).