Lab1 - Mark Dee Professor David J. Young Lab 1 Date:...

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Mark Dee Professor David J. Young Lab 1 Date: January 31 2011 1. The geologic record or time scale represents millions of rock layers that record events and times in geologic history. a. Reproduce the geologic time scale shown in this slide show. Eon Era Period Ma (Millions of Years Ago) Phanerozoic Proterozoic Archean Hadean Cenozoic Mesozoic Paleozoic Precambrian Precambrian Precambrian Neogene Paleogene Crustaceous Jurassic Triassic Permian Pennsylvannian Mississipian Devonium Silurian Ordovican Cambrian Precambrian Precambrian Precambrian 0 65.5 251 542 542 542
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b. Equate the total existence of the planet earth to one year. Make a scale which equates the beginning of an Era with a month of the year and show a percentage of time associated with each Eon. PROTEROZOIC PHANEROZOIC ARCHEAN HADEAN PRECAMBRIAN PALEOZOIC MESOZOIC CENOZOIC 316 YEARS PASS 185.5 YEARS PASS 65.5 YEARS PASS 56% 32% 12% (JANUARY (JUNE (NOVEMBER JUNE) NOVEMBER) DECEMBER) ______________________________________________________________________________________ January February March April May June July August September October November December
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c. What events define the Era boundaries? The life that appears during said Eras define the boundaries, as do the events that end them. For instance,
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This note was uploaded on 04/10/2012 for the course GEO 1111 taught by Professor Davidj.young during the Spring '11 term at University of Texas at Austin.

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Lab1 - Mark Dee Professor David J. Young Lab 1 Date:...

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