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Terms in this set (12)
actual age of an object (rock)
principle that a fault or intrusion is always younger than the rock layers it cuts through.
The scientific explanation of the development of new species.
The remains of traces of an ancient organism
refer to the total number of fossils that have been discovered, as well as to the information derived from them.
Geologic time period
The period of time covering the formation and development of the Earth, from about 4.6 billion years ago to today
Index fossils: Guide fossil
fossil found in the rock layers of only one geologic age and is used to establish the absolute age of the rock layers.
The spontaneous breakdown of a radioactive nucleus into a more stable nucleus.
method for determining the age of an object based on the concentration of a particular radioactive isotope contained within it
Age of an object compared with the ages of other objects.
Principle that a sedimentary rock layer is older than the layers above it an younger than the layers below it
Theory that geologic processes at work in the present were also at work in the past.
Sets with similar terms
Chapter Determining Relative Age
j1 earth history
Test - Chapter 8 - The Rock Record
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