| 词条 | Ocate volcanic field |
| 释义 |
| name = Ocate volcanic field | photo = | photo_caption = | elevation = {{convert|1800|to|3000|m|ft|sigfig=2|sp=us}}[1] | location = Mora County, New Mexico, United States | range = | coordinates = {{coord|36.12|-104.75|type:mountain_region:US|display=inline,title}} | coordinates_ref = [1] | topo = | type = Volcanic field | age = 8.3 - 0.8 million years[1] | volcanic_arc/belt = | last_eruption = }} The Ocate volcanic field (also known as the Mora volcanic field) is a monogenetic volcanic field located in the eastern Sangre de Cristo Mountains of northern New Mexico.[1] About 8.12 million years ago, basaltic volcanoes began to erupt in the Ocate area. Fourteen eruptive pulses have been recognized.[2] An unusual feature of the Ocate volcanic field is that the oldest basaltic flows form the highest mesas, and the youngest flows form surfaces lower in elevation. This reverse stratigraphy occurred because after the older flows were erupted about 8.3–5.7 m.y. ago on a relatively flat alluvial plain, the entire area was uplifted, and canyons were cut into the older basalt flows. Younger basalt flows then filled the major stream canyons. When uplift ceased, the youngest basalt flows of the Ocate volcanic field flowed on top of intermediate-aged flows.[2] See also
References1. ^1 2 3 {{cite book | last = Wood | first = Charles A. |author2=Jűrgen Kienle | title = Volcanoes of North America | publisher = Cambridge University Press | year = 1993 | pages = 293–294 | isbn = 0-521-43811-X }} 2. ^1 {{cite web | title = Coyote Creek State Park | work = Virtual Geologic Tour of New Mexico | publisher = New Mexico Bureau of Geology and Mineral Resources | year = 2008 | url = http://geoinfo.nmt.edu/tour/state/coyote_creek/home.html | accessdate = 2008-08-27}} External links
6 : Volcanic fields of New Mexico|Miocene volcanism|Landforms of Mora County, New Mexico|Pliocene volcanism|Pleistocene volcanism|Monogenetic volcanic fields |
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