Find a term from the labs, understand the process behind it, and see how it appears in the landscape. Each entry connects an explanation with a real observation and a model you can explore.
Term
ka
A thousand years. Used with an age reference to express geological dates, for example 20 ka before present.
What to look for
The volcanic host of this Peridot Mesa xenolith is described by its source as about 580 ka old: roughly 580,000 years. This dates the host eruption, not the formation of the older mantle fragment.
