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Page 10
Lead and uranium in meteorites ( 8 ) . U ( ppm ) 0.001 ( 9 ) ( 10 ) .009 Pb ( ppm ) .011 .010 0.37 * Canyon Diablo troilite Henbury troilite Modoc total stone Norton County total stone * Corrected for about 20 - percent terrestrial lead ...
Lead and uranium in meteorites ( 8 ) . U ( ppm ) 0.001 ( 9 ) ( 10 ) .009 Pb ( ppm ) .011 .010 0.37 * Canyon Diablo troilite Henbury troilite Modoc total stone Norton County total stone * Corrected for about 20 - percent terrestrial lead ...
Page 11
If the primary growth trend is projected back in time to the isotopic composition of the lead we have found in iron meteorites , the time of approximate equality is found to be about 4.5 x 109 yr . This can be interpreted to mean that ...
If the primary growth trend is projected back in time to the isotopic composition of the lead we have found in iron meteorites , the time of approximate equality is found to be about 4.5 x 109 yr . This can be interpreted to mean that ...
Page 13
The accumulation of lead in these samples during a period of 10 to 105 years might be considered to occur in such a way that the lead would be representative of an extremely large mass of material consisting of sedimentary rocks ...
The accumulation of lead in these samples during a period of 10 to 105 years might be considered to occur in such a way that the lead would be representative of an extremely large mass of material consisting of sedimentary rocks ...
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Contents
ANNUAL REVIEW | 166 |
PSYCHOLOGY | 189 |
Child Psychology M RadkeYarrow and L J Yarrow | 220 |
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AAAS acid activity addition Advancement American analysis animals annual appear application Association atomic biology California cells changes chemical chemistry College Committee complete conference containing contributions course Department determined director discussion Division effect electric energy engineering experiments field given Health held important increase indicate industrial Institute interest International Italy John laboratory lead light material means measure mechanics Medical Medicine meeting ment method Michigan natural Notes nuclear observed obtained operation organic percent period physics plant possible prepared present president Press problems professor published recent References reported Reviewed samples School Science scientific scientists Service sessions Society solution structure symposium Table tests theory tion United Univ University values Washington York
Bibliographic information
| Title | Science |
| Editor | John Michels (Journalist) |
| Contributor | American Association for the Advancement of Science |
| Published | 1955 |
| Original from | University of Minnesota |
| Digitized | 17 Dec 2019 |
| Export Citation | BiBTeX EndNote RefMan |