- Barker Mountain Natural Area Preserve (dnr.wa.gov)
The mid to upper slopes of Barker Mountain, from about 3,200 to 4,000 feet in elevation, are included within this preserve. A broad, east-west ridgetop with ledges and steep slopes defines the south side, while small depressions with seeps form the north side. This 120 acre preserve protects examples of shrub-grassland ecosystems (also known as shrub-steppe), including a large area of antelope bitterbrush/Idaho fescue habitat on the gently sloping summit ridge. Wooded areas with ponderosa pine, Douglas-fir, and antelope bitterbrush form a mosaic with the grassland patches and represent an important forest type within the foothills of the Okanogan Highlands of north- central Washington.
- Late Triassic (Wikipedia)
The Late Triassic is the third and final epoch of the Triassic Period in the geologic time scale, spanning the time between 237 Ma and 201.4 Ma (million years ago). It is preceded by the Middle Triassic Epoch and followed by the Early Jurassic Epoch. The corresponding series of rock beds is known as the Upper Triassic. The Late Triassic is divided into the Carnian, Norian and Rhaetian ages.