Examlex
Find the following limit.
Paleozoic
An era in the geological timescale, occurring between 541 and 252 million years ago, known for significant developments in life, including the Cambrian explosion.
Geologic Timescale
A chronologic subdivision of geologic time depicting the sequence of geologic events, including those represented by fossils; ages of boundaries are assigned through numeric dating of key rock units.
Earth Materials
Substances that constitute the Earth, including rocks, minerals, soil, and water.
Density
A measure of how much mass is present per given volume of a substance.
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