Legacy: A timeline >
300 Million Years Ago
During the Carboniferous Geologic Period,
from 345 to 280 million years ago, warm seas still covered
much, if not all, of Oregon. Forests of tree ferns and seed
ferns covered any exposed land. Seed ferns are really primitive
the modern-day conifer trees. Amphibians and insects became
common. Volcanoes in northeastern and southwestern Oregon
were active... the birth of more land.
*Gymnosperm is the botanical name
for the group of flowering plants that give rise to seeds
not enclosed in an ovary. A pine tree is a gymnosperm (small
naked seeds that develop inside a pine cone), whereas an
apple tree is not (seed is inside the apple, the meat of
the apple arising from the ovary of the fertilized flower).