[DOC] [TLE] Palaeos Timescale: The Phanerozoic Eon [PAR] The Phanerozoic represents a relatively brief period of half a billion years that ... 
This is in contrast to the "Precambrian", which lasted for a very much longer time, 
but ... modern period in the life of Gaia (following the Archean and the Proterozoic
), ... the three eras and eleven geological periods that comprise the Phanerozoic. [DOC] [TLE] The Proterozoic Eon - University of California Museum of Paleontology [PAR] From youngest to oldest, they are: the Proterozoic, the Archean, and the ... The 
period of Earth's history that began 2.5 billion years ago and ended ... Also 
coming from this time are the first abundant fossils of living organisms, ... This 
specimen, from the White Sea region of Russia, is about 1.5 cm across and 2.5-3 
cm long. [DOC] [TLE] past exam questions lecture 18: geologic time ii [PAR] The correct arrangement of the different types of geologic time divisions, from 
longest to shortest, is: ... The Hadean, Archean, and Proterozoic eons are 
collectively called the: A. Phanerozoic ... The only eon that has been subdivided 
into eras and periods in the geologic column ... Fossil C existed for a very long ... 
Page 3... [DOC] [TLE] Geologic time scale - Wikipedia [PAR] ... the Palaeozoic, Mesozoic and Cenozoic are eras of the Phanerozoic eon. The 
three million year Quaternary period, the time of recognizable humans, is too 
small to be visible at this scale. The geological time scale (GTS) is a system of 
chronological dating that relates geological ... Geologists qualify these units as "
early", "mid", and "late" when referring to... [DOC] [TLE] Geological history of Earth - Wikipedia [PAR] The geological history of Earth follows the major events in Earth's past based on 
the geologic .... The Precambrian includes approximately 90% of geologic time. ... 
It includes three eons, the Hadean, Archean, and Proterozoic. ..... chalk; indeed, 
more chalk formed in the Cretaceous than in any other period in the Phanerozoic. [DOC] [TLE] The Geologic Time Scale - ScienceViews.com [PAR] By assembling all these layers together, scientists have worked out what is 
known as the ... and today, The Phanerozoic begins with the start of the 
Cambrian period, 544 million years ago. ... An era of geologic time from the 
beginning of the Tertiary period to the present. Its name is ... The first two names 
are no longer used. [DOC] [TLE] Geological time scale - HyperPhysics [PAR] The vast expanse of geological time has been separated into eras, periods, and 
epochs. ... of time is divided into the Proterozoic, Archean, and Hadean eons in 
order of ... it is not implied here that these boundaries are known to 3 or 4 
significant digits. ... Quaternary Period, Cenozoic Era, Phanerozoic Eon [1.8 Myr - 
0 ]... [DOC] [TLE] Proterozoic Eon | geochronology | Britannica.com [PAR] Proterozoic Eon, the younger of the two divisions of Precambrian time, the older 
... During the period between 2.1 billion and 1.8 billion years ago, these ... 2,500 
miles) long, was very similar in origin to the Himalayan Mountains that ... Archean 
regions within Proterozoic cratons surrounded by Phanerozoic mobile belts. [DOC] [TLE] Geologic and Biological Timeline of the Earth - Scientific Psychic [PAR] Biological and Geologic Timeline of the Earth. ... object 2,000 kilometers in 
diameter at the time of the Late Heavy Bombardment. ... The Earth was very hot 
during the Archean Eon ..... An era is smaller than an eon and longer than a 
period. ... Proterozoic - The geologic eon lying between the Archean and 
Phanerozoic eons,... [DOC] [TLE] Geology 104 Geologic Time - Classes:geology uiuc [PAR] In this web exercise, you will study the geologic time scale, which subdivides all 
of Earth history into a sequence of periods. ... both of these times are longer than 
the entire Phanerozoic Eon, the Proterozoic and Archean ... What happened 
during the time between the beginning of Earth and the beginning of the Archean
? [DOC] [TLE] Geology 104 Geologic Time - Classes:geology uiuc [PAR] Geologic Time

Question: In geological time, the Archean, Proterzoic & Phanerozoic are 3 of these verrrry long periods
Answer: eons