A Relict Population
The Mojave Desert as we know it is probably less than 10,000 years old.
covered the lower slopes of the
present desert ranges and basins. As the climate became more arid,
this conifer woodland began to retreat. Now these trees are considered
a relict population, confined to higher elevations and areas such as
Hidden Valley, where there is enough moisture to support them.
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coexist in a microclimate.