The reason regarding the Precambrian consisting of fewer divisions than the rest of the time scale (although it accounts for nearly 90 percent of the geologic time), by referring to Figure 19.3 in Chapter 19 in this textbook.

Question

Want to see more full solutions like this?

Answer 1

Question

Chapter 19, Problem 1GST

To determine

The reason regarding the Precambrian consisting of fewer divisions than the rest of the time scale (although it accounts for nearly 90 percent of the geologic time), by referring to Figure 19.3 in Chapter 19 in this textbook.

Expert Solution & Answer

Answer to Problem 1GST

The reason regarding the Precambrian era consisting of fewer divisions than the rest of the time scale is because of having less knowledge about this time period. The primary reason is the absence of fossils in Precambrian rocks; many of these rocks are concealed within continental interiors or have been destroyed by tectonic processes.

Due to the lack in complete geologic record from this time, it is difficult to divide this span into smaller increments without more detailed data

Explanation of Solution

The 4.5 billion years of the Earth’s history is marked by two major eons, namely the Phanerozoic Eon (in Greek, “visible life”), which started about 541 million years ago and the Precambrian Eon, which started approximately 4 billion years ago. The Precambrian Eon is further divided into Archaen, (‘archaios’ denotes ‘recent’) and Proterozoic Eon (‘proteros’ denotes ‘before’; ‘zoe’ denotes ‘life’).

Although, the Precambrian represents nearly 88 % of the Earth’s history, it is not divided into eras, periods and epochs. The reasons for the lack of detailed time scale are stated below:

Not knowing enough about the detailed Precambrian history. The past 10 years of the Earth’s history is very well-documented because of its fresh, least distorted, and most observable record. As we go further back in time, the clues and records are more fragmented.
The Precambrian was dominated by simple organisms like bacteria, algae, fungi, and worms. These organisms lacked hard parts which did not favor preservation. Owing to this reason, the Precambrian had very little fossil records. Due to the lack of fossils, correlation with the exposed Precambrian rocks is usually difficult.

The Precambrian rocks are extremely old and are subjected to a great deal of change. Most of them are greatly distorted metamorphic rocks, broadly eroded and often hidden beneath the younger geological beds and thus, it makes the interpretation of the past environment difficult because of many clues being destroyed in the original sedimentary rocks.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Students have asked these similar questions

Shale and siltstone volcanic ash. erosjon surfaçe limestone sandstone erosion surface pegmatite granite slate dike BUY Ap

Retreating glacier Bedrock Till Stratified drift ▲ Figure 9.7 This diagram showing common depositional landforms depicts a hypothetical area affected by ice sheets in the recent geologic past. (Drumlin photo courtesy of Ward's Natural Science Establishment; esker photo by Richard P. Jacobs/ JLM Visuals; kame photo by John Dankwardt; kettle lake photo by Carlyn Iverson/Science Source)

Figure 9.9 is a stereogram showing a portion of the area covered by the Whitewater, Wisconsin, topographic map (Figure 9.10, page 160). Use the stereogram and the map to complete the following. 7. The streamlined, asymmetrical hills composed of till, labeled B, are what type of feature? 8. Examine the shape of the features labeled B on the map in Figure 9.10. How can these features be used to determine the direction of ice flow in a glaciated area? 9. Using the features labeled B in Figure 9.10 as a guide, draw an arrow on the map to indicate the direction of ice movement that occurred in this region. 10. What is the likely location of the outwash plain on the map? Identify and label the area "outwash plain." (Hint: Refer to Figure 9.7.) 11. Label the area covered by ground moraine. 12. What term is applied to the numerous almost circular depressions designated with the letter C?

Answer 2

Question

Chapter 19, Problem 1GST

To determine

The reason regarding the Precambrian consisting of fewer divisions than the rest of the time scale (although it accounts for nearly 90 percent of the geologic time), by referring to Figure 19.3 in Chapter 19 in this textbook.

Expert Solution & Answer

Answer to Problem 1GST

The reason regarding the Precambrian era consisting of fewer divisions than the rest of the time scale is because of having less knowledge about this time period. The primary reason is the absence of fossils in Precambrian rocks; many of these rocks are concealed within continental interiors or have been destroyed by tectonic processes.

Due to the lack in complete geologic record from this time, it is difficult to divide this span into smaller increments without more detailed data

Explanation of Solution

The 4.5 billion years of the Earth’s history is marked by two major eons, namely the Phanerozoic Eon (in Greek, “visible life”), which started about 541 million years ago and the Precambrian Eon, which started approximately 4 billion years ago. The Precambrian Eon is further divided into Archaen, (‘archaios’ denotes ‘recent’) and Proterozoic Eon (‘proteros’ denotes ‘before’; ‘zoe’ denotes ‘life’).

Although, the Precambrian represents nearly 88 % of the Earth’s history, it is not divided into eras, periods and epochs. The reasons for the lack of detailed time scale are stated below:

Not knowing enough about the detailed Precambrian history. The past 10 years of the Earth’s history is very well-documented because of its fresh, least distorted, and most observable record. As we go further back in time, the clues and records are more fragmented.
The Precambrian was dominated by simple organisms like bacteria, algae, fungi, and worms. These organisms lacked hard parts which did not favor preservation. Owing to this reason, the Precambrian had very little fossil records. Due to the lack of fossils, correlation with the exposed Precambrian rocks is usually difficult.

The Precambrian rocks are extremely old and are subjected to a great deal of change. Most of them are greatly distorted metamorphic rocks, broadly eroded and often hidden beneath the younger geological beds and thus, it makes the interpretation of the past environment difficult because of many clues being destroyed in the original sedimentary rocks.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Question

Chapter 19, Problem 1GST

To determine

The reason regarding the Precambrian consisting of fewer divisions than the rest of the time scale (although it accounts for nearly 90 percent of the geologic time), by referring to Figure 19.3 in Chapter 19 in this textbook.

Expert Solution & Answer

Answer to Problem 1GST

The reason regarding the Precambrian era consisting of fewer divisions than the rest of the time scale is because of having less knowledge about this time period. The primary reason is the absence of fossils in Precambrian rocks; many of these rocks are concealed within continental interiors or have been destroyed by tectonic processes.

Due to the lack in complete geologic record from this time, it is difficult to divide this span into smaller increments without more detailed data

Explanation of Solution

The 4.5 billion years of the Earth’s history is marked by two major eons, namely the Phanerozoic Eon (in Greek, “visible life”), which started about 541 million years ago and the Precambrian Eon, which started approximately 4 billion years ago. The Precambrian Eon is further divided into Archaen, (‘archaios’ denotes ‘recent’) and Proterozoic Eon (‘proteros’ denotes ‘before’; ‘zoe’ denotes ‘life’).

Although, the Precambrian represents nearly 88 % of the Earth’s history, it is not divided into eras, periods and epochs. The reasons for the lack of detailed time scale are stated below:

Not knowing enough about the detailed Precambrian history. The past 10 years of the Earth’s history is very well-documented because of its fresh, least distorted, and most observable record. As we go further back in time, the clues and records are more fragmented.
The Precambrian was dominated by simple organisms like bacteria, algae, fungi, and worms. These organisms lacked hard parts which did not favor preservation. Owing to this reason, the Precambrian had very little fossil records. Due to the lack of fossils, correlation with the exposed Precambrian rocks is usually difficult.

The Precambrian rocks are extremely old and are subjected to a great deal of change. Most of them are greatly distorted metamorphic rocks, broadly eroded and often hidden beneath the younger geological beds and thus, it makes the interpretation of the past environment difficult because of many clues being destroyed in the original sedimentary rocks.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Question

Chapter 19, Problem 1GST

To determine

The reason regarding the Precambrian consisting of fewer divisions than the rest of the time scale (although it accounts for nearly 90 percent of the geologic time), by referring to Figure 19.3 in Chapter 19 in this textbook.

Expert Solution & Answer

Answer to Problem 1GST

The reason regarding the Precambrian era consisting of fewer divisions than the rest of the time scale is because of having less knowledge about this time period. The primary reason is the absence of fossils in Precambrian rocks; many of these rocks are concealed within continental interiors or have been destroyed by tectonic processes.

Due to the lack in complete geologic record from this time, it is difficult to divide this span into smaller increments without more detailed data

Explanation of Solution

The 4.5 billion years of the Earth’s history is marked by two major eons, namely the Phanerozoic Eon (in Greek, “visible life”), which started about 541 million years ago and the Precambrian Eon, which started approximately 4 billion years ago. The Precambrian Eon is further divided into Archaen, (‘archaios’ denotes ‘recent’) and Proterozoic Eon (‘proteros’ denotes ‘before’; ‘zoe’ denotes ‘life’).

Although, the Precambrian represents nearly 88 % of the Earth’s history, it is not divided into eras, periods and epochs. The reasons for the lack of detailed time scale are stated below:

Not knowing enough about the detailed Precambrian history. The past 10 years of the Earth’s history is very well-documented because of its fresh, least distorted, and most observable record. As we go further back in time, the clues and records are more fragmented.
The Precambrian was dominated by simple organisms like bacteria, algae, fungi, and worms. These organisms lacked hard parts which did not favor preservation. Owing to this reason, the Precambrian had very little fossil records. Due to the lack of fossils, correlation with the exposed Precambrian rocks is usually difficult.

The Precambrian rocks are extremely old and are subjected to a great deal of change. Most of them are greatly distorted metamorphic rocks, broadly eroded and often hidden beneath the younger geological beds and thus, it makes the interpretation of the past environment difficult because of many clues being destroyed in the original sedimentary rocks.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Chapter 19, Problem 1GST

To determine

The reason regarding the Precambrian consisting of fewer divisions than the rest of the time scale (although it accounts for nearly 90 percent of the geologic time), by referring to Figure 19.3 in Chapter 19 in this textbook.

Expert Solution & Answer

Answer to Problem 1GST

The reason regarding the Precambrian era consisting of fewer divisions than the rest of the time scale is because of having less knowledge about this time period. The primary reason is the absence of fossils in Precambrian rocks; many of these rocks are concealed within continental interiors or have been destroyed by tectonic processes.

Due to the lack in complete geologic record from this time, it is difficult to divide this span into smaller increments without more detailed data

Explanation of Solution

The 4.5 billion years of the Earth’s history is marked by two major eons, namely the Phanerozoic Eon (in Greek, “visible life”), which started about 541 million years ago and the Precambrian Eon, which started approximately 4 billion years ago. The Precambrian Eon is further divided into Archaen, (‘archaios’ denotes ‘recent’) and Proterozoic Eon (‘proteros’ denotes ‘before’; ‘zoe’ denotes ‘life’).

Although, the Precambrian represents nearly 88 % of the Earth’s history, it is not divided into eras, periods and epochs. The reasons for the lack of detailed time scale are stated below:

Not knowing enough about the detailed Precambrian history. The past 10 years of the Earth’s history is very well-documented because of its fresh, least distorted, and most observable record. As we go further back in time, the clues and records are more fragmented.
The Precambrian was dominated by simple organisms like bacteria, algae, fungi, and worms. These organisms lacked hard parts which did not favor preservation. Owing to this reason, the Precambrian had very little fossil records. Due to the lack of fossils, correlation with the exposed Precambrian rocks is usually difficult.

The Precambrian rocks are extremely old and are subjected to a great deal of change. Most of them are greatly distorted metamorphic rocks, broadly eroded and often hidden beneath the younger geological beds and thus, it makes the interpretation of the past environment difficult because of many clues being destroyed in the original sedimentary rocks.

Answer 6

Chapter 19, Problem 1GST

To determine

The reason regarding the Precambrian consisting of fewer divisions than the rest of the time scale (although it accounts for nearly 90 percent of the geologic time), by referring to Figure 19.3 in Chapter 19 in this textbook.

Expert Solution & Answer

Answer to Problem 1GST

The reason regarding the Precambrian era consisting of fewer divisions than the rest of the time scale is because of having less knowledge about this time period. The primary reason is the absence of fossils in Precambrian rocks; many of these rocks are concealed within continental interiors or have been destroyed by tectonic processes.

Due to the lack in complete geologic record from this time, it is difficult to divide this span into smaller increments without more detailed data

Explanation of Solution

The 4.5 billion years of the Earth’s history is marked by two major eons, namely the Phanerozoic Eon (in Greek, “visible life”), which started about 541 million years ago and the Precambrian Eon, which started approximately 4 billion years ago. The Precambrian Eon is further divided into Archaen, (‘archaios’ denotes ‘recent’) and Proterozoic Eon (‘proteros’ denotes ‘before’; ‘zoe’ denotes ‘life’).

Although, the Precambrian represents nearly 88 % of the Earth’s history, it is not divided into eras, periods and epochs. The reasons for the lack of detailed time scale are stated below:

Not knowing enough about the detailed Precambrian history. The past 10 years of the Earth’s history is very well-documented because of its fresh, least distorted, and most observable record. As we go further back in time, the clues and records are more fragmented.
The Precambrian was dominated by simple organisms like bacteria, algae, fungi, and worms. These organisms lacked hard parts which did not favor preservation. Owing to this reason, the Precambrian had very little fossil records. Due to the lack of fossils, correlation with the exposed Precambrian rocks is usually difficult.

The Precambrian rocks are extremely old and are subjected to a great deal of change. Most of them are greatly distorted metamorphic rocks, broadly eroded and often hidden beneath the younger geological beds and thus, it makes the interpretation of the past environment difficult because of many clues being destroyed in the original sedimentary rocks.

Answer 7

Chapter 19, Problem 1GST

To determine

The reason regarding the Precambrian consisting of fewer divisions than the rest of the time scale (although it accounts for nearly 90 percent of the geologic time), by referring to Figure 19.3 in Chapter 19 in this textbook.

Answer 8

Expert Solution & Answer

Answer to Problem 1GST

The reason regarding the Precambrian era consisting of fewer divisions than the rest of the time scale is because of having less knowledge about this time period. The primary reason is the absence of fossils in Precambrian rocks; many of these rocks are concealed within continental interiors or have been destroyed by tectonic processes.

Due to the lack in complete geologic record from this time, it is difficult to divide this span into smaller increments without more detailed data

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Explanation of Solution

The 4.5 billion years of the Earth’s history is marked by two major eons, namely the Phanerozoic Eon (in Greek, “visible life”), which started about 541 million years ago and the Precambrian Eon, which started approximately 4 billion years ago. The Precambrian Eon is further divided into Archaen, (‘archaios’ denotes ‘recent’) and Proterozoic Eon (‘proteros’ denotes ‘before’; ‘zoe’ denotes ‘life’).

Although, the Precambrian represents nearly 88 % of the Earth’s history, it is not divided into eras, periods and epochs. The reasons for the lack of detailed time scale are stated below:

Not knowing enough about the detailed Precambrian history. The past 10 years of the Earth’s history is very well-documented because of its fresh, least distorted, and most observable record. As we go further back in time, the clues and records are more fragmented.
The Precambrian was dominated by simple organisms like bacteria, algae, fungi, and worms. These organisms lacked hard parts which did not favor preservation. Owing to this reason, the Precambrian had very little fossil records. Due to the lack of fossils, correlation with the exposed Precambrian rocks is usually difficult.

The Precambrian rocks are extremely old and are subjected to a great deal of change. Most of them are greatly distorted metamorphic rocks, broadly eroded and often hidden beneath the younger geological beds and thus, it makes the interpretation of the past environment difficult because of many clues being destroyed in the original sedimentary rocks.

Answer 12

Ch. 19.1 - Prob. 1CC Ch. 19.1 - Prob. 2CC Ch. 19.1 - Prob. 3CC Ch. 19.1 - Prob. 4CC Ch. 19.2 - Prob. 1CC Ch. 19.2 - Prob. 2CC Ch. 19.2 - Prob. 3CC Ch. 19.2 - Prob. 4CC Ch. 19.3 - Prob. 1CC Ch. 19.3 - Prob. 2CC

The reason regarding the Precambrian consisting of fewer divisions than the rest of the time scale (although it accounts for nearly 90 percent of the geologic time), by referring to Figure 19.3 in Chapter 19 in this textbook.

The reason regarding the Precambrian consisting of fewer divisions than the rest of the time scale (although it accounts for nearly 90 percent of the geologic time), by referring to Figure 19.3 in Chapter 19 in this textbook.

Answer to Problem 1GST

Explanation of Solution

Want to see more full solutions like this?

Chapter 19 Solutions