How Would We Use Isotopic Ages to Infer the Ages

question 125

Multiple Choice

How would we use isotopic ages to infer the ages of the upper and lower unit in this diagram?

• A) The lower unit would be younger than an age on the crosscutting dike.
• B) The upper unit would be older than an age determined on pebbles of the dike in that unit.
• C) The dike is younger than the lower unit but older than the upper unit.
• D) An age on the dike would not help us because it is an igneous rock.

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Definitions:

Bronfenbrenner

A theorist best known for proposing the ecological systems theory, which describes how the social environments from immediate surroundings to broader societal levels influence human development.

Cross-Sectional

A research design that compares different population groups at a single point in time.

Research Design

is a structured approach used in scientific studies to ensure the validity and reliability of findings, often specifying the methods for collecting, analyzing, and interpreting data.

Sequential

Relating to or forming part of a sequence, where items are arranged in a logical or chronological order.