نتایج جستجو برای: absolute chronology
تعداد نتایج: 92746 فیلتر نتایج به سال:
Thermochemical models have predicted that Ceres, is to some extent, differentiated and should have an icy crust with few or no impact craters. We present observations by the Dawn spacecraft that reveal a heavily cratered surface, a heterogeneous crater distribution, and an apparent absence of large craters. The morphology of some impact craters is consistent with ice in the subsurface, which mi...
the article discusses subjective issues in oral history. oral history, as a modem and different way of record's creation has been brought about new horizons in recent decades. in this method of capturing historical events, people are equally provided with opportunities to transfer their experiences. in this way, records production steps outside official track, and covers ordinary people as...
In any study of prehistoric intercontinental relations, nothing would seem more fundamental to the reconstruction of culture history than the role of trade. Short of the actual migrations of peoples, which seem to have been relatively infrequent, aboriginal trade must have played the decisive role in the spread of cultural influences. A consideration of the extent, composition and routes of tra...
We summarize geochemical, astronomical, and theoretical constraints on the lifetime of the protoplanetary disk. Absolute Pb-Pb-isotopic dating of CAIs in CV chondrites (4567.2 ± 0.7 m.y.) and chondrules in CV (4566.7 ± 1 m.y.), CR (4564.7 ± 0.6 m.y.), and CB (4562.7 ± 0.5 m.y.) chondrites, and relative Al-Mg chronology of CAIs and chondrules in primitive chondrites, suggest that high-temperatur...
A pologists throughout the centuries have recognized the significance of historical details in the biblical record and their impact on biblical claims of ultimate truth and divine origin. It has been famously remarked that " chronology is the backbone of history " (Thiele, 1983, p. 33). If this maxim is true, then the Christian apologist must understand that attacks on biblical chronology under...
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