Earth is a dynamic and evolving planet
Download
1 / 8

Earth Events - PowerPoint PPT Presentation


  • 728 Views
  • Uploaded on

Uniformitarianism is a cornerstone of geology ... of historical geology. aid in interpreting ... How Does the Study of Historical Geology Benefit Us? ...

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Earth Events' - Fernand


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Earth is a dynamic and evolving planet l.jpg

Earth is a Dynamic and Evolving Planet

  • changes in its surface


3 main themes l.jpg
3 Main Themes

Plate Tectonics

Evolution

Uniformitarianism


Uniformitarianism l.jpg
Uniformitarianism

  • Uniformitarianism is a cornerstone of geology

    • present-day processes have operated throughout geologic time

    • physical and chemical laws of nature have remained the same through time

  • to interpret geologic events

    • we must first understand present-day processes and their results

    • rates and intensities of geologic processes may have changed with time


Historical geology l.jpg
Historical Geology

  • In historical geology we study

    • changes in our dynamic planet

    • how and why past events happened

    • implication for today’s global ecosystems

  • Principles of historical geology

    • aid in interpreting Earth’s history

    • also have practical applications


Geologic time l.jpg
Geologic Time

  • Human perspective

    • seconds, hours, days, years

  • Ancient human history

    • hundreds or even thousands of years

  • Geologic history

    • millions, hundreds of millions, billions of years


Geologic time scale l.jpg
Geologic Time Scale

  • Resulted from the work of many 19th century geologists who

    • pieced together information from numerous rock exposures

    • constructed a sequential chronology based on changes in Earth’s biota through time

    • started as a relative time scale

  • The time scale was subsequently dated in years using radiometric dating techniques



How does the study of historical geology benefit us l.jpg
How Does the Study of Historical Geology Benefit Us?

  • Survival of the human species depends on understanding how Earth’s various subsystems work and interact

    • how we consumenatural resources and interact with the environment determines our ability to pass on this standard of living to the next generation

    • our standard of living depends directly on our consumption of natural resources that formed millions and billions of years ago

  • Study what has happened in the past, on a global scale, to try and determine how our actions might affect the balance of subsystems in the future


ad