The Age of Dinosaurs was so many millions of years ago that it is very difficult to date exactly. Scientists use two kinds of dating techniques to work out the age of rocks and fossils. The first method is called relative dating. This considers the positions of the different rocks in sequence in relation to each other and the different types of fossil that are found in them. The second method is called absolute dating and is done by analysing the amount of radioactive decay in the minerals of the rocks. Scientists find out the age of a dinosaur fossil by dating not only the rocks in which it lies, but those below and above it.
Fossils - What is a Fossil?
Eighth grade Lesson Index Fossils & Correlation Lab
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Layers of Rock
After dinner, what is the concept of geologic time period of. It is as younger layers is. Date rock strata in a relative dating to arrange geological events.
The lab is one in which students get to work together to figure out some geologic "puzzles". Correlating rock layers involves using techniques like index fossil correlation, superposition, and horizontal originality to piece together what happened in the past. Students are tasked with three "mini-labs" in this class block, which are of increasing complexity. We read the information collectively, with particular emphasis on the definition of what constitutes an index fossil , and the criteria that make it one 1.