What rock layer in column 4 would be the same age in column 2. How do you know?

Question

What rock layer in column 4 would be the same age in column 2. How do you know? The Crinoid is 340 million years old, the ammonite is 125 million years old. How old is layer X C. What is the age of layer N? How do you know? What principle of Stratigraphy did you use How old is layer G Which layer is the oldest how old is it What era did this Crinoid live in The Ammonite Are either of the two creatures found in today's oceans? What is Relative Age dating, and how did it help you determine the ages of the rock layers? Word Analysis. In each of the group of 4 words-CIRCLE THE WORD THAT DOES NOT BELONG Hutton Geology Past/Present Volcanology Questions Testing Guess Hypothesis Atlantic Pacific trenches Squeezed Challenger Submarines WWII Ocean floor Mapping Convergent Divergent India/Asia U.S West Coast

Explanation / Answer

1 A. Rock layer N of column 4 is equivalent to rock layer E of column 2 , this can be infered by the presence of Pecten in both the layer which represent the same age.

B.

C. Nis the youngest in the layer sequence. Layer N is not present in any other sucession and accord to the Law of Fossil Succession Younger rocks are always overlies the older rocks.

D. layer G is more than 123 Million year old. or it have formed before the age of the Ammonite.

E. Layer M in coloumn 1 is the oldest as it lies in the base of the sucession and it's devoid of any fosil record. andit's age would be more than cambrian.

F. Crinoid lived in Cenozoic Era. where as Ammonites are of Upper Cretaceous i.e, in Mesozoic era.

G. Few species of Crinoid can be found as it has under gone selective mass extinction at the end of Permian Period. Where as Ammonites has under gone an mass extinction during the Cretaceous Period.

H. Relative dating is the science of determining the relative order of past events without necessarily determining their absolute age. Relative age can be determined by the application of the Principles of relative chronology and Paleantology in Geology as

1 Uniformitarianism

2 Intrusive relationships

3 Cross-cutting relationships

4 Inclusions and components

5 Original horizontality

6 Superposition

7 Faunal succession

8 Lateral continuity

9 Inclusions of Igneous rocks

10 Included fragments

11 Paleantology.

V 1. Hutton

2.

3. Squeezed

4. WWII

5. U.S. West Coast

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