碳循环是一个生物地质化学循环圈，碳通过此循环在生物圈、土壤圈、地层、水圈、大气中交流。
The carbon cycle is the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth.
数据库中除了生物、年代地层对比信息资料外，沉积、地球化学信息也应纳入。
The sedimentary and geochemical information should be included in the database besides that of bio stratigraphy and chronostratigraphy.
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