[DOC] [TLE] About the geologic time scale [PAR] For the next major contribution to the geologic time scale we turn to William Smith 
... The geologic history of the Earth is broken up into hierarchical chunks of time. 
From largest to smallest, this hierarchy includes eons, eras, periods, epochs, and 
ages. ... to as the Precambrian and is usually divided into the three eons shown. [DOC] [TLE] The Earth's Geologic Time Scale Eons Eras Periods Epoch Life [PAR] Earth Earth's Geologic Geological Time Scale Line Eon Era Period Epoch ... 
Eons are divided into eras, which are in turn divided into periods, epochs and 
ages. ... to refer to the layers of rock that correspond to these periods of geologic 
time. [DOC] [TLE] GEOLOGIC EONS, ERAS and PERIODS - Paleontology and ... [PAR] Two or more periods comprise a geological Era. Two or more Eras form an Eon, 
the largest division of geologic time. Some periods are divided into epochs. [DOC] [TLE] Geological time scale - HyperPhysics [PAR] The vast expanse of geological time has been separated into eras, periods, and 
... of time is divided into the Proterozoic, Archean, and Hadean eons in order of ... 
For examples that cover most of these time periods, see the outline of the Grand... [DOC] [TLE] Geologic time scale - Wikipedia [PAR] The geological time scale (GTS) is a system of chronological dating that relates 
geological ... Eons are divided into eras, which are in turn divided into periods, 
epochs and ages. ... "erathem", "system", "series", and "stage" are used to refer to 
the layers of rock that correspond to these periods of geologic time in Earth's 
history. [DOC] [TLE] Palaeos: Time: Geological Timescale [PAR] An introduction to Deep Time, the Geological Timescale and dating the Earth's 
past. ... These eras are divided into periods, the system of which was established 
by the ... The periods are in turn divided into epochs, and the epochs are divided 
into ... For the sake of brevity the eras and periods of the three Precambrian eons
... [DOC] [TLE] Earth History Curriculum - Chapter 1, Lesson 2: Geologic Time Scale [PAR] Earth History Curriculum, Chapter 1, Lesson 2: Geologic Time Scale. ... Eons are 
divided into eras, which are in turn divided into periods, epochs and ages. ... 
used to refer to the layers of rock that correspond to these periods of geologic 
time. [DOC] [TLE] Geologic time scale - Net Texts [PAR] Eons are divided into eras, which are in turn divided into periods, epochs and 
ages. ... the layers of rock that correspond to these periods of geologic time. [DOC] [TLE] Following the Geological Timeline - Prehistoric Oregon [PAR] The geologic time scale is a system of chronological measurement that ... These 
are then broken into Periods, which are then divided into the Epochs. ... Eons are 
divided into eras, which are in turn divided into periods, epochs and ages. [DOC] [TLE] How is earth's history divided? | Socratic [PAR] Feb 16, 2016 ... Geologists have divided Earth's history into a series of time intervals ... Eons are 
divided into eras, which in turn are divided into periods, epochs and ages. 
Geologists qualify these units as Early, Mid and Late when referring to... [DOC] [TLE] cosscience1 / Lesson 9-02 Geologic Time Scale [PAR] Historians divide human history into certain periods, such as the ... Taken 
together, these time spans make up the geologic time scale. ... in Figure 17, the 
geologic time scale is divided into eons, eras, periods, and epochs. ... Turn in 
your notes. [DOC] [TLE] DRAM, FGS, Geologic Time Scale [PAR] Jul 1, 2015 ... Geologists use a geologic time scale to describe the 4.5 billion ... The 
Phanerozoic Eon is divided into three Eras, the latest of which is the ... into two 
Periods, the Tertiary and Quaternary, which are in turn divided into a number of 
Epochs. ... These are commonly based on the life forms which existed during... [DOC] [TLE] Geologic and Biological Timeline of the Earth - Scientific

Question: In geologic time, eons are divided into these, which are in turn divided into periods
Answer: eras