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1. Ordovician Period -- Britannica Online Encyclopedia
Britannica online encyclopedia article on Ordovician Period:in geologic time, the second period of the Paleozoic Era. ... topic/431581/Ordovician-Period> ...
-- http://www.britannica.com/EBchecked/topic/431581/Ordovician-Period

2. Ordovician - Palaeos
An Ordovician scene showing the huge Endocerid nautiloid cephalopod Cameroceras ... Ordovician topics: Stratigraphy | Geography | Climate | Life | Important Fossil ...
-- http://www.palaeos.org/Ordovician

3. Ordovician - What is a(n) Ordovician | Encyclopedia.com: Dictionary Of ...
What is a(n) Ordovician – Our Zoology Dictionary has, ecology, physiology, ... Research topic:Ordovician period. Related pictures ...
-- http://www.encyclopedia.com/doc/1O8-Ordovician.html

4. Ordovician: Definition from Answers.com
Ordovician adj. Of or belonging to the geologic time, system of rocks, or sedimentary deposits of the second period of the Paleozoic Era,
-- http://www.answers.com/topic/ordovician

5. Ordovician period Research | Find Ordovician period Articles ...
Make Ordovician period Research, School Reports, Research ... Research topic: Ordovician period. Related pictures. Rate these pictures. Ordovician period ...
-- http://www.encyclopedia.com/topic/Ordovician_period.aspx

6. Ordovician - Search Results - MSN Encarta
Ordovician ... Search for books about your topic, "Ordovician" Search Results Feedback ... Ordovician - Wikipedia, the free encyclopedia ...
-- http://encarta.msn.com/Ordovician.html

7. Ordovician Period - MSN Encarta
Ordovician Period, second division of the Paleozoic Era of the geologic time scale, spanning a period from ... about your topic, Ordovician Period, selected by ...
-- http://encarta.msn.com/encyclopedia_761568685/Ordovician_Period.html

8. Ordovician - Conservapedia
The Ordovician period is a theorized second period in the ... Debate Topics. Recent changes. All pages. All images. All logs. Random page. Help. Help Index ...
-- http://www.conservapedia.com/Ordovician

9. Ordovician period: Information from Answers.com
Ordovician Period Interval of geologic time, 488.3 – 443.7 million years ago, the second oldest period of the Paleozoic Era ... The Ordovician rocks are ...
-- http://www.answers.com/topic/ordovician-period

10. Ordovician - Definition from the Merriam-Webster Online Dictionary
Definition of Ordovician from the Merriam-Webster Online Dictionary ... Ordovician noun. Learn more about "Ordovician" and related topics at Britannica.com ...
-- http://mw1.merriam-webster.com/dictionary/Ordovician

11. Geologic time: Ordovician - Topic - The Taxonomicon
The Taxonomicon. Home > Topics > Details. Site map | Contact. Geologic time: Ordovician ... http://www.palaeos.com/Paleozoic/Ordovician/Ordovician.htm ...
-- http://taxonomicon.taxonomy.nl/Topic.aspx?id=799

12. Ordovician Period
... page describes the Ordovician Period, including stratigraphy ... The end of the period is marked by a major extinction event. Related Topics. Further Reading ...
-- http://www.peripatus.gen.nz/paleontology/Ordovician.html