Relative Time:. Ages of events are placed in order of occurrence. No exact date is identified. Ex. WWI and WWII I am the second child in my family. Absolute Time:. identifies the exact date of an event. Ex. 65 Million Years Ago 1990. Finding age with relative time:.
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2. The law of cross-cutting relationships – anything that cuts across layers of rock is younger than the rocks that it has intruded into. This applies to faults and igneous intrusions.
Thinly sliced cabbage.
Note: contact metamorphism is the same event as the intrusion.
Layers are formed according to superposition.
Something happens to uplift the area
Erosion wears away the uppermost layers
Area submerges and deposition begins again.