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[DOC File]EON
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EON ERA Period Epoch YEARS AGO WHAT WAS HAPPENING ON EARTH Precambrian 4.6 billion – 570 million years ago (mya) 3.5 billion years ago Cyanobacteria found in fossil record Invertebrates found in fossil record end of Precambrian 1.5 billion ya Grenville supercontinent existed 700mya Grenville supercontinent begins to breakup Phanerozoic
eon era period epoch order

[DOC File]Major events in Earth’s geologic history
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Here you can find detailed information about each eon, era, period and epoch in Earth History. Furthermore, you can learn about how the geologic time scale was created and how it is organized. My Time Scale: Major Life Events *DO NOT WRITE ON THIS PAPER.
eon era period epoch chart

[DOCX File]Lesson Plan: Understanding Geologic Time - Casper College
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1. Eon: Era: Period: Epoch: 6. During which period would you find humans? 7. During which period would the first birds arrive? Which era? 8. During which period would the first flowering plants evolve? 9. During which period do the first fish appear? 10. What are fossils? 11. Describe how fossils form in sedimentary rock. 12. How are molds ...
epoch era period eon ages

[DOC File]Evolution EOG Review
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Eon: _____ Era: _____ Period: _____ Epoch: _____ Why is relatively little detail known to geologists about the time period called the Precambrian? (circle two answers) The Precambrian only makes up a small fraction of Earth history. An asteroid impact destroyed most of the Precambrian rock record ...
eon definition

[DOC File]De La Salle Institute
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A) eon, era, epoch, period B) era, period, epoch, eon C) eon, epoch, period, era D) eon, era, period, epoch Answer: D Diff: 1 23) Assume that man's recorded history can be stretched back to 4600 years before the present. This is approximately what fraction of geologic time?
how long is an eon

Time Words: Era, Epoch, and Eon - Daily Writing Tips
EON ERA PERIOD EPOCH PIVOTAL EVENTS P h a n e r o z o i c E o n "Visible Life" Organisms with skeletons or hard shells. 540 mya through today. P h a n e r o z o i c E o n "Visible Life" Organisms with skeletons or hard shells. 540 mya through today. P h a n e r o z o i c E o n "Visible Life" Organisms with skeletons or hard shells.
geologic time eras and periods

[DOC File]PRACTICE EXAM #1 - GEOL 131 HFCC
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Label the appropriate levels with “eon”, “era”, period”, “epoch”, and “events”. Note that the time line itself is an era. Draw a vertical line on this time line where each …
earth's history and geologic time scale

[DOC File]APPENDIX A
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Jan 19, 2010 · Eon. Era. Mesozoic . Period. Epoch . Table . Paleozoic; old life. Mesozoic; end marked by many extinctions. Cenozoic; recent life . Section 21.2 Relative-Age Dating . C. B. D. A. A. B. B. D. C. C. B. A gap in the rock record occurs between a sedimentary rock overlying sedimentary rock. The sedimentary rock was uplifted and exposed to erosion ...
geologic eras and periods

[DOC File]Major Life Events - Mrs. Cline's Science Class!
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period = A unit of time shorter than an era but longer than epoch. epoch = A unit of time shorter than a period but longer than an age. Archean = “Ancient” eon from 4,500 Mya – 2,500 Ma. Proterozoic = “Early life” eon from 2,500 Ma – 540 Ma. Paleozoic = “Ancient life” eon from 540 Mya – 248 Ma.
eon era period epoch order

Eon era period epoch