1.What is the dominant sedimentary rock type shown in Figure 4.7? 2.What does th

Question

1.What is the dominant sedimentary rock type shown in Figure 4.7?

2.What does the red color suggest about the environment of deposition?

0.5 m Cretaceous North Horn Formation, Utah Rock Type: Conglomerate with interbeds of sandstone Composition: Boulders, cobbles, and pebbles comprised of sandstone and limestone. Matrix comprised of quartz, lithics, and mud Texture: Poorly sorted, large clasts subrounded, sand-size material angular to subrounded Color: Red to reddish brown Sedimentary Structures: Thick-bedded with primary dips of a few degrees to the east; gravel-filled channels Fossils: None Regional Trend: Formation is over 2,000 feet thick in central Utah; it becomes thinner and finer-grained to the east

Explanation / Answer

Red beds

They are deposited in hot climates under oxidizing conditions.

red beds are deposited mostly in non marine environments like fluvial.

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