FiltersDone

Question type

Essay

Multiple Choice

Short Answer

True False

Matching

Exam 3: How Old Is Old the Rock Record and Geologic Time

Show Answer

Share

---

All types

Filters

Study FlashcardsPractice ExamLearn

Question 31

Essay

Review LaterAdd Note

Review Later

For the figure below give two possible explanations for the stratigraphy at site 3,in which unit E sits directly on top of C.

Correct Answer

verified

Stratum D is missing at site 3...

View Answer

Show Answer

Question 32

Essay

Review LaterAdd Note

Review Later

Scientists claim that Earth is 4.56 billion years old.Why hasn't a rock been found that is this old?

Correct Answer

verified

The continual recycling of Earth's surfa...

View Answer

Show Answer

Question 33

True/False

Review LaterAdd Note

A magnetic reversal is a period of time in which Earth's magnetic polarity reverses itself.

Would the principles of stratigraphy used to determine relative ages on Earth be useful tools for determining relative ages on the Moon or Mars? Explain your answer.

A(n)______is a gap in the rock record across which there is a significant amount of missing time.

Explain the methods used by geologists to approximate the numerical ages of the stratigraphic time scale.How are these ages being continually refined?

Our best estimate for the age of the Earth is _____.

Of the many radiometric dates obtained from Precambrian rocks,the oldest is about _____ billion years.

What are carbonaceous chondrites?

For the block diagram below,what stratigraphic principle allowed you to determine the relative age of the intrusion and the stratigraphic sequence labeled 1?

In the block diagram below,the contacts between layers in the tilted stratigraphic sequence labeled 1,are examples of

Discuss the importance of the Ediacaran Period.

------------------- is the process in which an element spontaneously transforms into another isotope of the same element,or into a different element.

Numerical age is the age of a rock or geological feature in years.

What are magnetic reversals,and how often do they occur?

For the block diagram below,what type of unconformity is labeled as 1?

Lord Kelvin based his estimate of Earth's age on how long it must have taken Earth to cool by conduction.

Generally describe the methods by which numerical dates can be determined for igneous rocks.What assumptions are used in these dating methods?

Name the eras of Phanerozoic time,starting from oldest to youngest.

A period of time in which Earth's magnetic polarity reverses itself is termed a__________________ .