Which of the following statements accurately describes the development of the geologic time scale? a.)scientists developed the geologic time scale using fossilized remains from europe and asia. b.)scientists developed the geologic time scale by studying rock layers and index fossils worldwide. c.)the geologic time scale was developed so scientists could put earth’s rocks in order by absolute age. d.)the geologic time scale was developed so geologists could describe short segments of time in earth’s history.

B.) Scientists developed the geologic time scale by studying rock layers and index fossils worldwide. These layers in which the sedimentary rocks are placed, are called Strata, are formed by accumulation, compaction and cementation of sediments. The analysis of the strata, their rock composition, fossil content, disposition, etc., provides valuable data on Earth's past. Dating or absolute age is a numerical value, almost exact. For example, if a rock is said to be 3,000 million years old, it is referring to its absolute age. To know the absolute age of a rock or a stratum, techniques such as radioactive isotope dating must be applied.

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