What have scientists used to build a chronology of earths past

What have scientists used to build a chronology of earths past

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  1. Multiple questions. specify one
    [tex]Iwill make you the brainliest easy question each year, new seafloor is added at the mid-atlantic rid[/tex]

  2. Hi,

    Scientists have used rock samples to date the Earth's past. They also might use Steno's principles. 

    Relative dating is the determination of the age of a rock or geological event by comparing with other rock/ geologic events. Absolute dating is a form of geologic dating that gives an actual date or age in history that the item was formed or died in years. 

    Steno's principles are: 

    Law of superposition - Bottom layer is the oldest, top layer of the youngest In undisturbed layers of sedimentary rock or magma.

    Original horizontally - When sedimentary rock layers form, they are "created in a horizontal form.

    The Principle of Lateral Continuity - States that layers of sediment initially extend laterally in all directions.

    Faith xoxo

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