GeoSci28 - 2 The diagram above shows a geologic cross-section of some rocks such as you might see in a cliff The tree is growing on top of the modern

GeoSci28 - 2 The diagram above shows a geologic...

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2.The diagram above shows a geologic cross-section of some rocks, such as you might see in a cliff. The tree is growing on top of the modern surface. Rock layers A, B, C, D, E, and F are sedimentary; E contains mud cracks and fossil footprints as shown. G is igneous rock that hardened from hot, melted rock. H, I and J are faults, and K and L are unconformities. Sedimentary rocks are right-side-up unless there is some indication given to show something else. Referring to the rocks you see here ......Which is the oldest sedimentary rock layer?A.CB.DC.FD.EE.B
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The package of sediments C, D, E, and F is upside-down, as shown by the footprints and mud cracks, so C is the oldest one.Points Earned:0/1Correct Answer:AYour Response:D3.The two pictures above, I and II, show fossils in rocks from the Grand Canyon. Each is "typical"; the rocks near sample I contain fossils similar to those shown in sample I, and the rocks near sample II contain fossils similar to those shown in sample II. It is likely that: Sample I is a wonderful shell hash, or coquina, from the Supai Rocks well up the side of the Canyon, and contains shells from a great diversity of different creatures. Sample II includes algal-mat deposits (stromatolites) from the Precambrian Chuar Group of the Grand Canyon
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Supergroup, deep in the Canyon near the river, from a time when biology was not a whole lot more diverse than algal mats.
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  • Spring '99
  • Furman
  • Geology

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