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The Fossil Record definitions

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  • Fossil
    Preserved evidence of ancient life, which can include remains, imprints, or traces, not limited to hard parts like bones.
  • Sedimentary Rock
    Layered material formed from compressed sediment, often the primary environment for the preservation of ancient remains.
  • Amber
    Hardened tree resin capable of encapsulating and preserving entire small organisms, especially insects, in remarkable detail.
  • Trace Fossil
    Indirect evidence of past life, such as footprints or burrows, revealing behavior or movement rather than physical form.
  • Paleontologist
    A scientist specializing in the study and interpretation of ancient life through preserved remains and traces.
  • Fossil Record
    The cumulative collection of preserved remains and traces, providing a timeline and context for the history of life.
  • Bias
    A systematic distortion in preserved evidence, favoring certain environments, body types, or time periods over others.
  • Relative Dating
    A method that estimates the age of remains based on their position within layered deposits, without assigning exact years.
  • Radiometric Dating
    A technique using the predictable decay of radioactive isotopes to assign specific ages to ancient materials.
  • Isotope
    A variant of a chemical element with a specific number of neutrons, some of which are unstable and decay over time.
  • Half-life
    The time required for half of a radioactive substance to decay, serving as a clock for dating ancient materials.
  • Carbon-14
    A radioactive form of carbon used to date organic remains up to about 60,000 years old by measuring its ratio to stable carbon.
  • Volcanic Ash
    Material from eruptions that forms distinct layers, providing datable horizons for establishing the age of surrounding remains.
  • DNA
    A biomolecule sometimes preserved in frozen or well-protected remains, enabling genetic analysis of ancient organisms.
  • Sedimentation
    The process of particles settling and accumulating, creating environments favorable for the preservation of ancient life.