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The term “time-specific facies” (TSF) was introduced to the scientific community by the late Otto H. Walliser to refer to unique facies typical of particular narrow intervals, some of which were related to bioevents. In some senses, however, the concept was recognized much earlier and is even engrained in the very names of some geologic periods. The concept of time-specific facies is expanded slightly...
Coordinated stasis, as defined herein, represents an empirical pattern, common in the fossil record, wherein groups of coexisting species lineages display concurrent stability over extended intervals of geologic time separated by episodes of relatively abrupt change. In marine benthic fossil assemblages, where the pattern was first recognized, the majority of species lineages (60 to more than 80%)...
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