نتایج جستجو برای: comprises hills
تعداد نتایج: 38431 فیلتر نتایج به سال:
Detrital zircons as old as nearly 4.4 Ga from the Jack Hills, Western Australia, offer possible insights into a phase of Earth history for which there exists no known rock record. Ti concentrations of Hadean zircons indicate a spectrum of crystallization temperatures that range from a cluster at ca. 680 °C to apparent values exceeding 1200 °C. The low temperature peak has been interpreted to in...
an epidemic, which was perhaps as protracted and severe in its effects, as any other that has ever occurred in a regiment, even in this country. This history not only contains points of interest and importance, (especially those bearing on the movements of troops into camp,) but it will also serve to show that the position of the 58th during the epidemic was in many respects similar to that in ...
Sm–Nd and Sm–Nd systematics were investigated in garnet inclusions in diamonds from Finsch (S. Africa) and Hadean zircons from Jack Hills (W. Australia) to assess the potential of these systems as recorders of early Earth evolution. The study of Finsch inclusions was conducted on a composite sample of 50 peridotitic pyropes with a Nd model age of 3.3 Ga. Analysis of the Jack Hills zircons was p...
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