Chapter 10.9, Problem 1A

Summary Introduction

a.

To determine:

The number of half-lives that elapsed since the formation of dike K.

Introduction:

When the analysis of the mineral sample from dike K was done, it was indicated that 25 percent of the isotope of the parent sample was found to be present in the sample.

Summary Introduction

b.

To determine:

The age of dike K in numerals.

Introduction:

The half-life of the geologic material is defined as the time needed by the parent isotope to decay into the daughter isotope.