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Liberia has some of the largest iron ore reserves in Africa, with iron content of 30% to 67%, in banded iron formations from the Precambrian. The high grade ores, with more than 60% are primarily hematite, while lower grade ores with 30 to 40% iron are generally magnetite. Liberia also has medium-grade deposits of mixed hematite and magnetite.
The original Geological Survey of California was replaced in April 1880 by the new California State Mining Bureau. This was renamed the Division of Mines in 1927. In 1962 the division's name was expanded to be California Division of Mines and Geology , a name that lasted until August 2006, when the state legislature renamed the division the ...
This page was last edited on 30 September 2021, at 09:53 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
In 2005, White was a visiting geology department professor at the University of New Orleans, where she mentored students and helped to promote opportunities for geoscience majors at college to African Americans. [5] Since 2012 she has been the director for education and outreach at the Museum of Paleontology, University of California Berkeley. [1]
Clear Lake Volcanic Field; Highest point; Elevation: 4,724 ft (1,440 m) [1] Coordinates: 2]: Geography; Location: Lake County, California, United States: Parent range: North Coast Ranges: Topo map: USGS Kelseyville: Geology; Rock age: less than 2.1 million years [3]: Mountain type(s): lava domes, cinder cones, maars within volcanic field [2]: Last eruption: Holocene [2]: Geologic map of the ...
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