Geologic Time Scale Worksheet Answers. Eon largest division of geologic time era broad spans of time based on the general type of life existing during that time zoic animal life paleozoic ancient life mesozoic middle life dinosaurs cenozoic recent life mammals ends of eras are usually marked by a great extinction period shorter spans of time based on evidence of major disturbances in earth s crust and on the characteristics of the common rock formations epoch subdivisions of a periods. Eons are divided into eras eras are divided into periods and periods are divided into epochs.
Put the following in order from oldest to most recent by writing a number in the blank beside each. The geologic time scale is a record of the geologic events and the evolution of life forms. The geologic time scale is broken into divisions and subdivisions.
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The geologic time scale is broken into divisions and subdivisions. 3 1 precambrian time mesozoic era. The divisions are called eons. Explain the relationships among eons eras epochs and periods of the geologic time scale.
