Tryon Creek is a 4.85-mile 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 in Multnomah and Clackamas counties. The stream flows southeast from the Tualatin Mountains 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. Known as the Waverly Hills Formation, it lies buried under ash and lava from later volcanic eruptions, sediments from flooding and erosion, and layers of wind-blown silt. Two dormant volcanoes from the Boring Lava Field are in the Tryon Creek watershed.
Risorsa: Wikipedia.org
Diritti d'autore: Creative Commons 3.0
| | Pubblica
Clackamas, Stati Uniti
Scopri gli itinerari più belli e popolari della zona, accuratamente raggruppati in apposite selezioni.
Risorsa: Finetooth
Diritti d'autore: Creative Commons 3.0
Scopri i luoghi di interesse più belli e popolari della zona, accuratamente raggruppati in apposite selezioni.
Con RouteYou puoi creare facilmente mappe personalizzate. Traccia il tuo itinerario, aggiungi waypoint o nodi, luoghi di interesse e di ristoro, e condividi le mappe con la tua famiglia e i tuoi amici.
Pianificatore di itinerari<iframe src="https://plugin.routeyou.com/poiviewer/free/?language=it&params.poi.id=1489099&params.language=en" width="100%" height="600" frameborder="0" allowfullscreen></iframe>
Prova questa funzionalità gratuitamente con un abbonamento di prova RouteYou Plus.
Se hai già un tale account, accedi ora.
© 2006-2024 RouteYou - www.routeyou.com