| 词条 | Mount Sylvania |
| 释义 |
| name = Mount Sylvania | photo = Mount Sylvania in Portland Oregon.JPG | photo_caption = Top as seen from Tualatin | elevation_ft = 978 | elevation_ref = {{NAVD88}}[1] | prominence = {{convert|510|ft|0|abbr=on}} | prominence_ref = [2] | location = Multnomah County, Oregon, U.S. | range = Tualatin Mountains | coordinates = {{coord|45.438174217|N|122.72164825|W|type:mountain_region:US-OR_scale:100000_source:NGS|format=dms|display=inline,title}} | range_coordinates = | coordinates_ref = [1] | topo = USGS Lake Oswego | type = Shield volcano[3] | age = | volcanic_field = Boring Lava Field | first_ascent = | easiest_route = }} Mount Sylvania is an extinct volcano, part of the Boring Lava Field, on the outskirts of Portland, Oregon. Parts of the mountain are within the cities of Portland, Lake Oswego, and Tigard. Mountain Park, a Lake Oswego suburban development, was built on the mountain in the 1970s. The Sylvania campus of Portland Community College is located on the mountain's western slopes. References1. ^1 {{cite ngs |id=RD2538 |designation=Sylvania Reset |accessdate=2008-11-17}} 2. ^{{cite peakbagger |pid=32965 |name=Mount Sylvania, Oregon |accessdate=2016-04-27}} 3. ^ {{cite web | url = http://vulcan.wr.usgs.gov/Volcanoes/Oregon/BoringLavaField/description_boring_lava.html | title = The Boring Lava Field, Portland, Oregon | publisher = USGS: Cascades Volcano Observatory | archiveurl = https://web.archive.org/web/20110701101745/http://vulcan.wr.usgs.gov/Volcanoes/Oregon/BoringLavaField/description_boring_lava.html | archivedate = 2011-07-01 | accessdate = 2008-04-01 }} External links
10 : Volcanoes of Oregon|Mountains of Oregon|Subduction volcanoes|Cascade Volcanoes|Volcanoes of Multnomah County, Oregon|Volcanoes of Clackamas County, Oregon|Lake Oswego, Oregon|Shield volcanoes of the United States|Mountains of Clackamas County, Oregon|Landforms of Multnomah County, Oregon |
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