[DOC] [TLE] About the geologic time scale [PAR] 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. All of these are displayed in the portion of the geologic time scale shown 
below. ... The Phanerozoic is subdivided into three major divisions: the Cenozoic,
... [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 ... of rock that correspond to these periods of geologic time in Earth's 
history. ... series that is then subdivided into zones based on succession of 
trilobites. [DOC] [TLE] What is a eon, a era, a period and a epoch? | Yahoo Answers [PAR] Feb 6, 2010 ... Epoch: A subdivision of geologic time that is longer than an age but shorter than 
a period. The Tertiary Period is divided into five epochs:... [DOC] [TLE] Geologic Time Scale: Major Eons, Eras, Periods and Epochs - Video ... [PAR] The geologic time scale is an essential tool for understanding the history of Earth 
and the evolution of life. ... They break up geologic time into larger and smaller 
chunks, so that major events are ... The Cenozoic era is the one we are in today. 
... Keep in mind that these three eras are all grouped within the Phanerozoic eon. [DOC] [TLE] Geologic Time Scale - Geological Time Line - Geology.com [PAR] Geologists have divided Earth's history into a series of time intervals. ... you can 
see the Phanerozoic Eon is the most recent eon and began more than 500 
million years ago. Eras. Eons are divided into smaller time intervals known as 
eras. ... possible and the periods of the Cenozoic are frequently subdivided into 
epochs. [DOC] [TLE] The Geologic Time Scale Flashcards | Quizlet [PAR] One of the largest units of geologic time is the era. There are four ... Divided into 2 
periods: Tertiary and Quaternary, which are then subdivided into epochs. [DOC] [TLE] Time Words: Era, Epoch, and Eon - Daily Writing Tips [PAR] An epoch is longer than an era and can cover more than one lifetime. It is marked 
... into eras. A geological era is subdivided into periods, epochs, and stages. [DOC] [TLE] cosscience1 / Lesson 9-02 Geologic Time Scale [PAR] 1. c. Students know the evidence from geological studies of Earth and other 
planets suggests that ... Taken together, these time spans make up the geologic 
time scale. ... Finally, periods are divided into still smaller units called epochs. 
The eon that began about 540 million years ago is the Phanerozoic, a term 
derived from... [DOC] [TLE] Appendix - ClassZone [PAR] The geologic time scale is divided into eons, eras, periods, epochs. (ehp-uhks) ... 
fossil record of this eon, it is further divided into smaller units of time called eras... [DOC] [TLE] Geologic time scale - New World Encyclopedia [PAR] Apr 21, 2015 ... The geologic time scale is used by geologists and other scientists to map ... is the 
eon, which is further divided successively into eras, periods, epochs, and stages. 
... are far more recognized faunal stages than defined geologic time units. ... For 
over one hundred years, the age of the Earth and of the rock... [DOC] [TLE] Phanerozoic - New World Encyclopedia [PAR] Apr 11, 2016 ... The Phanerozoic eon is the interval of geologic time spaning from the ... The 
Phanerozoic eon is divided into three eras: The Paleozoic, Mesozoic, and 
Cenozoic. ... The naming of periods and epochs in the Cenozoic era is most 
formally ... One of these alternate periods, the Quaternary, comprises the... [DOC] [TLE] Geologic time scale - Topics [PAR] Eons are divided into eras, which are in turn divided into periods, epochs and 
ages. ... layers of rock that correspond to these periods of geologic time in Earth's 
history. ... series that is then subdivided into zones based on succession of

Question: In geologic time one of these, shorter than an eon, is divided into periods & subdivided into epochs
Answer: era