7 Questions
What does stratigraphy focus on?
The history of Earth's rocks
How is an era measured?
In millions of years
What is a period in geological time scale?
A unit clearly understood and fundamental
What do epochs signify in geological time?
Local variations in rock formations
What does lithology signify?
Nature and composition of rocks
What is the smallest unit on the geological time-frame?
Stage
What does correlation achieve in geology?
Reveals the geological history of a region
Test your knowledge on carbonate minerals like calcite and mica group minerals including micas and pyroxenes. Learn about the crystal structures and properties of these important rock forming minerals.
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