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14.6: Activity 14E - Assembling Geologic Time

  • Page ID
    14850
  • In Figure 14.26, there are two intrusions that have been numerically dated using K-Ar techniques:

    • Intrusion A (dike) has a K-Ar ratio of 87.5% : 12.5%.
    • Intrusion B (granite) has a K-Ar ratio of 75% : 25%.

    1. What can we say about the age of layer “F” in both numerical and geologic terms?

    14.26.png
    Figure 14.26: Illustration to use in question 1-2 in Activity 13E.

    Attributions

    • Figure 14.26: “Assembling Geologic Time” (CC-BY 4.0; Chloe Branciforte, own work)
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