Lead (Pb) having four isotopes (mass numbers 204, 206, 207, and 208) in the proportions generally obtained by analyzing lead from rocks and lead minerals that are associated with little or no radioactive material; commonly considered to be the lead present at the time of the Earth's formation, as distinguished from lead produced later by radioactive decay. AGI
Source:
Dictionary of Mining, Mineral, and Related Terms












    What Topic Is Your Geology Paper On?  

 ENTER YOUR TOPIC HERE:    

Over 70,000 Research Papers, Essays & Term Papers - Ready to Download!

<Navigation>


Search!


<Index>

Acoustics
Agriculture
Anthropology
Archaeology
Architecture
Biology
Biotechnology
Cancer
Chemistry
Composers
Dance
Electronics
Environment
Fine Art
Geology
Invertebrate
Plant
Political Science
Psychology
Scientists
Sociology


<Top Level>

WebRef.org
About Us
Copyright Notice
Privacy Statement


Iverson Software: Providing Reliable & Innovative Education Solutions since 1987!

About Us  DeveloDex™  OptiMall™  Success Tools  Tabularium™  WebRef™

Google
Search WWW Search webref.org


K12 Shipping
JourneyEd.com is the leading supplier of discounted software to students and faculty.


icon



Easy CGI Web Hosting
This site hosted by EASY CGI Web Hosting
Iverson Software Co., is not responsible for typographical errors. Information deemed to be accurate, but not guaranteed. Offers subject to change at any time. Copyright © 1987-2006 Iverson Software Co. Some material copyright of their respective holders. All Rights Reserved Worldwide.