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Initially, this work was designed to document and study the diversification of modern mammalian groups and was quite successful and satisfying. However, as field and laboratory work continued, there began to develop a suspicion that not all of the Eocene story was being told. It became apparent that most fossil samples, especially those from the American West, were derived from similar ...
This volume consists of papers developed from a joint ACE/ISSI symposium on the "Composition of Matter" honoring the occasion of Johannes Geiss's 80th birthday The purpose of the symposium was to explore new insights into the composition of solar-system and galactic matter, and fractionation processes affecting samples of this matter, that have been brought about by recent space missions, ...