Examlex
Summative evaluation is normally conducted before the program has been implemented.
Unconformity
A surface within rock layers that represents a period of erosion or non-deposition, indicating a break in the geological record.
Index Species
Species that indicate the presence of particular environmental conditions, used by scientists to assess the health of ecosystems.
Fossilization
The process by which living organisms are preserved as fossils, including permineralization, cast and mold formation, and amber entrapment.
Isotopic Ages
The determination of the age of a material based on the decay rate of its radioactive isotopes, crucial for understanding geological and archaeological timelines.
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