Worked Example: Relative Geologic Time
The oldest dating method which studies the successive placement of layers.
Dendrochronology, or tree-ring dating, provides absolute dates in two different ways: directly, and by calibrating radiocarbon results.
So, often layers of volcanic rocks above and below the layers containing fossils can be dated to provide a date range for the fossil containing rocks.
These methods use the principles of stratigraphy to place events recorded in rocks from oldest to youngest.
Based on the law of superposition, what is the order of these rock layers, from youngest to oldest? Geologists have studied the order in which fossils appeared and disappeared through time and rocks.
Yes, radiometric dating is a very accurate way to date the Earth.