Eras periods epochs time scale

    • [PDF File]Lab Handout Lab 5. Geologic Time and the Fossil Record ...

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      Some of the eons, eras, periods, epochs, and stages in the geologic time scale, based on data from Gradstein, Ogg, and Hilgen (2012). Notice that different stages are nested within an epoch, different epochs are nested within a period, and different periods are nested within an era. Eon Era Period Epoch Stage Time (mya)

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    • [PDF File]Chapter 8 Measuring Geological Time

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      Figure 8.1.4 The periods (middle row) and epochs (bottom row) of the Cenozoic era. [Image Description] Most of the boundaries between the periods and epochs of the geological time scale have been fixed on the basis of significant changes in the fossil record. For example, as already noted, the boundary

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    • [PDF File]GSA GEOLOGIC TIME SCALE v. 5

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      gsa geologic time scale v. 5.0 cenozoic age epoch age picks magnetic polarity period hist. chro n. quater-nary pleistocene* miocene oligocene eocene paleocene pliocene piacenzian zanclean messinian tortonian serravallian langhian burdigalian aquitanian chattian rupelian priabonian bartonian lutetian ypresian danian thanetian selandian calabrian ...

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    • [PDF File]Investigating the Past Using a Geologic Time Scale

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      Using a Geologic Time Scale . In this activity, students in groups of three will construct a vertical representation of a Geologic Time Scale and research facts, events, and organisms that differentiate between Time Scale Eras, Periods, and Epochs. Teacher Background Information . 1. Activity length: 2-3 days depending on the time needed for ...

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    • [PDF File]The Geological Time-scale - GeoScience - Home

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      time-scale, which was developed in a somewhat random fashion (mostly in Europe) during the 19th century. It is a worldwide scale developed by correlation of fossils from all around the world. It is based the fossil record discussed above. geological time-scale divides the history of Earth is divided into eons, e , periods and epochs.

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    • [PDF File]Exploring Geologic Time Poster Illustrated Teacher's …

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      Worksheet # 1 – The Geologic Time Scale (Expected Results) Answer the questions in the spaces provided. 1. Explain the relationships among eons, eras, epochs and periods of the geologic time scale. Eons are the largest spans of time in the geologic time scale. Eons are divided into smaller units called eras. Eras are subdivided into periods.

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    • [PDF File]KEY CONCEPT The geologic time scale shows Earth’s past.

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      The geologic time scale divides Earth’s history into eons, eras, periods, and epochs. Geologic Time Scale 734 Unit 5:The Changing Earth Precambrian Time at 3.6 Billion Years Ago Paleozoic Era at 544 Million Years Ago At the beginning of the Paleozoic era, all life lived in the oceans. For nearly 4 billion years, during most of Precambrian ...

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    • [PDF File]The Geologic Time Scale - Holland

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      THE GEOLOGIC TIME SCALE Geologists have divided Earth's history into the geologic time scale . The geologic time scale is a "calendar" that divides Earth's past into units of time calledeons, eras, periods and epochs. These units of time are based on …

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    • [PDF File]Geologic Time and Earth’s

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      What is the Geologic Time Scale? (slide 4) Standard 8-2.4 `Epochs, Eons, Eras, and Periods (slide 4) How was the time scale and it‟s divisions created? (slide 5) A complete Geologic Time Scale with references to S.C. (slides 6-7) Table of Contents Principles of the …

      eons periods eras and epochs

    • [PDF File]Geologic Time Scale and Brief History of Life on Earth

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      The Geologic Time Scale and a Brief History of Life on Earth The Geologic Time Scale is divided into four major units: Eons, Eras, Periods and Epochs. An Eon is the longest division of geologic time, so long in fact that there have only been four Eons. Collectively the first three eons are called the Precambrian, that stretch of

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    • Geologic Time Scale Foldable

      Use the scale of 1 inch = 50 million years to draw your timeline. That means your timeline will span 9-10 sheets of paper. Please tape the sheets together to make one continuous timeline without any breaks. 1) Below the timeline, accurately label the Epochs, Periods and Eras.

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    • [DOC File]Geologic Time Scale:

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      Geological Time Scale. Contrasting several dating techniques chronicling Earth’s history to produce a geologic Time Scale. Geologic Time Scale- divided into Eons, Eras, Periods, and Epoches. Phanerozoic Eon (evidence of life began) divided into three eras. Paleozoic (ancient life) dominated by marine invertebrates

      eons eras periods

    • Geologic Time Scale (GTS) Eons, Eras, Periods, Epochs

      The scale is divided into eons, era, periods, and epochs. An . Eon, billions of years ago, is divided by the . Cambrian boundary. when the variety of life forms exploded. An . Era. includes mass extinctions that mark the boundaries between eras. A . Period. includes blocks of time when a unique rock series was laid down. Fossils

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    • [DOC File]Making a Geologic Time Line - Minnesota Earth Science ...

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      Seven epochs are names for the periods of the Cenozoic era. 776 The epochs of other periods usually are just termed early, middle, and late. 777 The Pleistocene epoch, which ended just 10,000 years ago, coincides with a time span commonly known as the ice age. 778 The detail on the time scale does not begin until about 540 million years ago ...

      geologic eras periods and epochs

    • [DOC File]Work with your group members at your table to make a ...

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      eras are divided into periods. periods can be further divided into epochs. Major information found on the geologic time scale includes: Precambrian is the name given to the earliest span of time in Earth history. Geologists divide the time between Precambrian and the present into three long units called eras (Paleozoic, Mesozoic, Cenozoic).

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    • [DOC File]Geologic Time

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      Geologic Time Scale Foldable. Take a piece of plain paper and fold it so there are 4 sections. On the outside flaps, you will label each of these for the 4 ERAS of Geologic Time. Precambrian. Paleozoic. Mesozoic. Cenozoic. Inside. the foldable: On the top section on the inside: draw 4-5 pictures to represent the organisms that were living ...

      eon era period epoch chart

    • Notes on Diversity of Life, Fossils and Geologic Time

      Structure of the Time Scale. The geologic time scale is divided into eons, eras, periods and epochs. Eons represent the longest intervals of geologic time. * Eons are divided into eras. * Each era is subdivided into periods. * Periods are divided into still smaller units called epochs. In general, the breaks between units on the time scale mark ...

      eons periods eras and epochs

    • [DOC File]Chapter 8: Geological Times

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      These two eras take up 85% of the total length of geologic time. Because this would make the adding machine tape so long we are only going to include the last three eras, which marks the beginning of the abundant fossil record. Objectives: To compare and contrast relative lengths of the geologic eras, periods, and epochs. Materials:

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    • [DOC File]Ch 12 - Mr. Neason's Earth Science - Home

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      This time scale was developed gradually, mostly in Europe, over the eighteenth and nineteenth centuries. Earth's history is subdivided into eons, which are subdivided into eras, which are subdivided into periods, which are subdivided into epochs.

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