The fine-grained Cedar Mesa Sandstone is pictured below. What structure does it exhibit and which environment produced this layer?  

Fly to each of the locations in the Question 16 folder. Make sure to explore the images in the area by selecting the photo icons. Which location best represents the coastal environments at 1.85 Ga based on the feature found in question #15?

What time period does this describe?

Check the “Yucatan, Mexico” folder and double click to fly there. Inspect the area highlighted in the “Yucatan, Gulf of Mexico” Image overlay. As well as the “Drill Core M0077A” placemark (click its name to view two images representing important finds within the core at ~65 Mya). Which of the following statements is NOT supported by the data at this location:

What best explains the presence of the lake at the base of this valley?

The rock identified above is 4.03 Ga. This is the oldest yet dated rock in Earth’s history. Which part of Earth’s biography does this characterize?

Check the box next to the “Canyonlands” placemark. Double click to fly there. We can see three distinct layers in this valley (a gray-base, pink-middle, and light tan-top). Match the geologic principle to a fact it tells about this landscape:

Check the box next to “Acasta Complex, Yellowknife, Canada”. Double click to fly there. Click on the placemark to view the sample taken from this location. This rock sample was collected from an outcrop revealing the Canadian shield (which is part of the North American craton) What kind of rock is this?

What does this outcrop tell us about the Earth at this time in the late Proterozoic?

What is the historical significance of this rock?