 | | Journal (article/letter/editorial) | | Perganon PressLtd. Printed inNorthern Ireland A survey of the unequilibrated ordinary chondrites R. T. DODD...iron contents of olivines and low-calcium pyrosenes in thirty-one ordinary Twenty-five of (H-, L- and LL-group)...unequilibrated. Petrographic study of these chondrites reveals that those of each chemical group whose silicates...textural (absence of chondrule-chondrule and chondrulematrix intergrowth; presence of a fine-grained, dark...chondrules of silicic glass), mineralogical (near-absence of visible plagioclase; predominance of monoclinic |  | | Journal (article/letter/editorial) | | in Northern Ireland Compositional characteristics of olivines from Apollo 12 samples PATRICKBUTLER,JR...revisedform 7 Fe&uary 1972) Abstr&--The olivine phenocrysts of four basalts (12004, 12008, 12009 and 12022) are...which suggest fractional crystallization and absence of Fe-Mg reequilibration. In the magnesium- and olivine-rich...olivines (should the rock represent the composition of a melt), features which suggest extensive Fe-Mg re-equilibration...concentrations of minor elements at crystallization have also been preserved in the Mg-rich centers of olivines |  | | Report (issue) | | U.S. DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY THE FORD-FLEISCHER FILE OF MINERALOGICAL REFERENCES...standards. Dept. Mineral Sciences, National Museum of Natural History, Smithsonian Institution, Washington...Ford-Fleischer File of Mineralogical References 1982-1987 Inclusive In 1916, Prof. W.E. Ford of Yale University...just published the Third Appendix to Dana's System of Mineralogy, 6th Edition, began to plan for the 7th...contained data that should be considered in the revision of the 6th Edition. The file was maintained in duplicate |
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