Why
Giant Conifers?
This landscape has not always been dominated by giant conifers. A journey through
time reveals past forests.
August 1, 40 million years ago
It's hot and sticky. You're strolling through a leafy forest of over 40 different
types of hardwood trees. The air is heavy with the scent of magnolia blossoms
and thick with buzzing insects. You see no conifers, except as small patches on
distant mountain slopes.
August 1, 10 million years ago
A cool breeze blows. Although you're leaning against a sycamore tree, hardwoods
are difficult to find. Instead, conifers have moved down and grown into giants.
You wonder....why has the forest changed?
About 15 million years ago
About 15 million years ago the climate cooled. This was partly due to world-wide
volcanic eruptions that blocked the sun with clouds of ash. Also, the slow rise
of the coastal mountains changed local weather patterns. Cooler summers and wet,
mild winters favoured conifers and gradually they edged out the one-flourishing
hardwoods. |