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Стр. 1328
Plagioclase is present in every rock sample , from about 5 to 10 percent ( 12075 ) to 70 percent ( 12013 ) . ... Many of the rocks are equigranular gabbros , some are ophitic and subophitic diabases , and others are variolitic basalts .
Plagioclase is present in every rock sample , from about 5 to 10 percent ( 12075 ) to 70 percent ( 12013 ) . ... Many of the rocks are equigranular gabbros , some are ophitic and subophitic diabases , and others are variolitic basalts .
Стр. 1336
Several crystalline rocks give ages between 1.7 and 2.7 X 100 years with an average value of 2.3 x 109. Rock 12013 has a unique chemistry , characterized in part by much higher abundances of K and U , and consequently also of radiogenic ...
Several crystalline rocks give ages between 1.7 and 2.7 X 100 years with an average value of 2.3 x 109. Rock 12013 has a unique chemistry , characterized in part by much higher abundances of K and U , and consequently also of radiogenic ...
Стр. 1338
The crystalline rocks contain less Ni , K , Rb , slight degree of enrichment of the latThe major findings of the prelimi- Zr , U , and Th than the fine material . ter elements indicates an early stage of nary examination of the lunar ...
The crystalline rocks contain less Ni , K , Rb , slight degree of enrichment of the latThe major findings of the prelimi- Zr , U , and Th than the fine material . ter elements indicates an early stage of nary examination of the lunar ...
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LETTERS | 932 |
Y Pomeranz K F Finney R C Hoseney | 950 |
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