30 points
>
>
Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- IIT JAM
- Geology (GG)
The least important method of determining the age of precambrian rocks is
Choose Your Answer:
2 Attempts
Submit Now
- 2 Likes
- 2 Comments
- 0 Shares
-
![comment-profile-img]()
>
-
![comment-profile-img]()
>
Sajan sarthak Best Answer
Carbon 14 isotopes has half-life less than 6000year so it will all be lost by radioactively. Precambrian rocks are very old like 2500 my so we can't have carbon to date that
![cropped8456554307462886830.jpg]()
Do You Want Better RANK in Your Exam?
Start Your Preparations with Eduncle’s FREE Study Material
- Updated Syllabus, Paper Pattern & Full Exam Details
- Sample Theory of Most Important Topic
- Model Test Paper with Detailed Solutions
- Last 5 Years Question Papers & Answers
Sign Up to Download FREE Study Material Worth Rs. 500/-
Rahul kumar![best-answer]()
C14 is least important for determining the age of precambrian rocks. Precambrian rocks are older than 550 million years and half life of C14 is around 5700 years. After 550 million years the amount of remaining parent isotope of C14 will be insignificant. That's why C14 can not be used to date precambrian rocks. The other isotopes given in the question have large half lifes and hence can be used to date precambrian rocks.