Tryon Creek is a 4.85-mile (7.81 km) tributary of the
Willamette River in the U.S. state of
Oregon. Part of the drainage basin of the
Columbia River, its watershed covers about 6.5 square miles (16.8 km2) in
Multnomah and
Clackamas counties. The stream flows southeast from the
Tualatin Mountains (West Hills) through the
Multnomah Village neighborhood of
Portland and the
Tryon Creek State Natural Area to the Willamette in the city of
Lake Oswego. Parks and open spaces cover about 21 percent of the watershed, while single-family homes dominate most of the remainder. The largest of the parks is the state natural area, which straddles the border between the two cities and counties. The bedrock under the watershed includes part of the last exotic
terrane, a chain of
seamounts, acquired by the
North American Plate as it moved west during the
Eocene. Named for mid-19th century settler,
Socrates Hotchkiss Tryon, Sr., the creek ran through forests of
cedar and
fir. Efforts to establish a large park in the watershed began in the 1950s and succeeded in 1975 when the
state park was formally established. As of 2005, about 37 percent of the watershed was wooded and supported more than 60 species of birds as well as small mammals,
amphibians, and fish. (
more...)
... that the ruins of the
Maya city of Mixco Viejo in
Guatemala received their name because they were believed to be the remains of another city entirely?
Two
olive baboons(Papio anubis) engaged in social grooming, an activity that
social animals (including humans) engage in to clean or maintain one another's body or appearance. Grooming also reinforces
social structures, family links, and builds
relationships. It has been best studied among
primates, but insects, birds, fish, and other mammals are known to engage in it as well.
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