The Jurassic Morrison Formation consists of mudstones and siltstones and is famo

Question

The Jurassic Morrison Formation consists of mudstones and siltstones and is famous for hosting dinosaur fossils in some localities in the United States, such as Montana, Wyoming, and the Dakotas. Which of the following statements has to be true? Select one: a. The Jurassic Period was dominated by siltstone and mudstone deposits all over the world, and the dinosaur fossils don't say anything useful about the depositional environment at that time. b. The Morrison Formation was deposited at a time when the dinosaur species preserved in the rock were alive on Earth c. The Morrison Formation was deposited after the dinosaurs preserved in it had already become extinct. d. The Morrison Formation was deposited via landslide events in environments where dinosaurs were the prominent group of animals. This rock fizzes when it interacts with HCI acid, and it is full of coral reef fossils. What kind is it? Select one: a. Metamorphic b. Sedimentary c. Igneous d. Lava

Explanation / Answer

3)option b)

reason : since morrison formation took place during late jurassic period when dinosaurs walked on earth

4) option b) sedimentary

reason : sedimentary rock fizzes on reaction with hcl

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.