Examlex
A particular star appears approximately equally bright when viewed through a blue filter and through a yellow filter. What is the approximate surface temperature of this star?
Geologic Timescale
A system of chronological measurement that relates stratigraphy to time, used by geologists to describe the timing and relationships of events in Earth history.
Mesozoic
The geological era that lasted from about 252 to 66 million years ago, including the time of dinosaurs and the break-up of Pangaea.
Disconformity
A type of unconformity in the geologic record that represents a period of erosion or non-deposition between layers of sedimentary rock, where the rock layers are parallel but there is a noticeable gap in the geological time recorded.
Preserved Fossil
A remnant or impression of an organism from a past geologic age that has been preserved in rock.
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