How Does The Particle Size Distribution Affect The Types Of Vegetation That Can Grow On A Soil?

How does the particle size distribution affect the types of vegetation that can grow on a soil?
Which of the rock units described below contain evidence for an sea that covered the middle of North America during the Cretaceous? (Select all that apply.) Some shale not shown 7. Cenozoic boulder conglomerate and sandstone at the top of the section include clasts derived from the Precambrian crystalline rocks of the Front Range and from some local volcanic terrains. These rocks record the forma- tion and erosion of the mountains 70 m.y. to 40 m.y, ago. 6. The shale is overlain by late Mesozoic sandstone, shale, and coal with plant fossils. These layers were deposited on land and along shorelines. 5. A thick sequence of gray shale is next. It contains marine shells, shark teeth, and fish bones. The unit includes beds of limestone and sandstone deposited during minor transgressions and regressions, respectively, 4. Above the Morrison Formation is the Dakota Formation, which contains plant fossils, dinosaur tracks, and sedimentary features, such as ripple marks, that indicate it represents shoreline facies, including beaches. The upper two photographs show ripple marks and dinosaur tracks on the tilted beds. 3. The Morrison Formation, famous for its dinosaur fossils and tracks, is middle Mesozoic in age (Jurassic). It includes shale, sandstone, and freshwater lime- stone. It is interpreted to have been deposited in wetlands, rivers, and lakes. 2. Above the red beds is a sequence of mostly red late Paleozoic and early Mesozoic rocks. The upper part contains mudstone and marine limestone and is interpreted to have been deposited in a coastal mud flat. It also contains well-sorted, cross-bedded sandstone, interpreted to represent sand dunes. 1. The lowest sedimentary unit is a reddish sequence of sandstone and poorly sorted, coarse conglomerate and breccia (D). This unit is interpreted to have been deposited by rivers and debris flows that drained an ancient mountain range called the Ancestral Rockies. The unit is late Paleozoic in age and rests on Precambrian rocks. Unit 5 Unit 4 Unit 7 Unit 1 Unit 3
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