ちしつじだい
地質時代
1. geological age; geological era
2. Geologic time scaleThe geologic time scale is a system of chronological measurement that relates stratigraphy to time, and is used by geologists, paleontologists, and other earth scientists to describe the timing and relationships between events that have occurred throughout Earth's history. The table of geologic time spans presented here agrees with the dates and nomenclature set forth by the International Commission on Stratigraphy, and uses the standard color codes of the United States Geological Survey.
Read “Geologic time scale” on English Wikipedia
Read “地質時代” on Japanese Wikipedia
Read “Geologic time scale” on DBpedia
Read “Geologic time scale” on English Wikipedia
Read “地質時代” on Japanese Wikipedia
Read “Geologic time scale” on DBpedia
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