Principles of dating sedimentary rocks

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September 30, by. Dinosaurs disappeared about 65 million years ago. That corn cob found in an ancient Native American fire pit is 1, years old. How do scientists actually know these ages? Geologic age dating—assigning an age to materials—is an entire discipline of its own.
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Steno's Laws or Principles

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Relative Dating - Geosciences LibreTexts

Something that we hope you have learned from these lessons and from your own life experience is that the laws of nature never change. They are the same today as they were billions of years ago. Geologists always use present-day processes to interpret the past. If you find a fossil of a fish in a dry terrestrial environment did the fish flop around on land? Did the rock form in water and then move? Since fish do not flop around on land today, the explanation that adheres to the philosophy that natural laws do not change is that the rock moved.
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What is the Principles of Dating Sedimentary rocks?

Nicolaus Steno introduced basic principles of stratigraphy, the study of layered rocks, in [ 1 ]. William Smith , working with the strata of English coal mines, noticed that strata and their sequence were consistent throughout the region. The figure of this geologic time scale shows the names of the units and subunits. Using this time scale, geologists can place all events of Earth history in order without ever knowing their numerical ages.
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There are different ways of determining the age of sedimentary rocks. I will explain one of them. Radiometric dating is a common method. Every element on the periodic table has a specific half life. I will use C14 as an example.
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