| 词条 | Diamond Craters | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 释义 |
| name = Diamond Craters | photo = DiamondCratersMalheurMaar.jpg | photo_caption = Malheur Maar, the only lake-filled maar in Diamond Craters | map = Oregon | map_caption= none | location = Harney County, Oregon, U.S. | coordinates = {{coord|43.1|N|118.75|W|type:mountain_region:US-OR_scale:100000_source:GVP|format=dms|display=inline,title}} | elevation_ft = 4707 | elevation_ref = [1] | prominence = | range = Basin and Range | topo = USGS Diamond Swamp | range_coordinates = | coordinates_ref = [1] | type = Volcanic field / shield volcano | age = 7320 to 7790 calendar years. B.P.[2] | last_eruption = | first_ascent= | easiest_route = roads and trails | map_width = 240 }}Diamond Craters is a monogenetic volcanic field in southeastern Oregon, about {{Convert|40|mi|km|0}} southeast of the city of Burns. It consists of a {{Convert|27|sqmi|km2|0|adj=on}} area of basaltic lava flows, cinder cones, and maars. The reexamination of radiocarbon dates from older studies and interpretation of paleomagnetic data and new radiocarbon dates limits the eruption of volcanic vents in this volcanic field to the time period between 7320 and 7790 calendar years B.P.[2] Diamond Craters and the nearby Diamond post office were named after the Diamond Ranch, established in the area by the pioneer Mace McCoy. The ranch used a diamond-shaped brand, hence the name.[3] In the 1970s, Diamond Craters was a source of controversy between the Bureau of Land Management and commercial stonecutters who were illegally removing slabs of lava to sell as veneer for fireplaces, home exteriors, and chimneys.[4] Geologists familiar with the area cited the craters' unusual research value, a "museum of basaltic volcanic features" apt to be destroyed by slab harvesting and associated heavy equipment.[4] In 1982, the area gained additional protection when it was designated an Outstanding Natural Area.[3] Notable vents
References1. ^1 2 3 4 5 6 7 8 9 10 11 12 {{cite gvp|vn=322170|name=Diamond Craters}} 2. ^1 Sherrod, D.R., D.E. Champion, and J.P. McGeehin (2012) Age and duration of volcanic activity at Diamond Craters, southeastern Oregon. Journal of Volcanology and Geothermal Research. 247–248:108–114 3. ^1 {{cite book | last = McArthur | first = Lewis A. | authorlink = Lewis A. McArthur |last2= McArthur|first2=Lewis L.|authorlink2=Lewis L. McArthur | title = Oregon Geographic Names | origyear = 1928 | edition = 7th| year = 2003 | publisher = Oregon Historical Society Press | location = Portland, Oregon| isbn = 0-87595-277-1 | page = 286}} 4. ^1 {{cite news|last=Hofferber|first=Connie|title=BLM, Stonecutters Square Off Over Mining Diamond Craters|url=http://infoweb.newsbank.com/resources/doc/nb/image/v2%3A11A73E5827618330%40EANX-NB-13223E2C5FE0DE8C%402444089-131FAC2740019D5B%4068-13227541BB5F2C48%40?p=AMNEWS|via=NewsBank|work=The Oregonian|date=August 3, 1979|page=69|accessdate=January 4, 2016|subscription=yes}} External links{{commons category|Diamond Craters}}
8 : Volcanoes of Oregon|Volcanic fields of Oregon|Shield volcanoes of the United States|Crater lakes|Maars of Oregon|Landforms of Harney County, Oregon|BLM-administered lands in Oregon|Protected areas of Harney County, Oregon |
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