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File:Taconite.jpg

Taconite.jpg (360 × 270 pixels, file size: 43 KB, MIME type: image/jpeg)

Description Taconite. In the United States, a hard, silica-rich iron ore called taconite (shown above) is mined in the Lake Superior region.
Date Unknown date
Source imgTaconite.jpg from iron.html
Author USGS
Permission
(Reusing this file)
Public domain
This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.

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copyright status

public domain

applies to jurisdiction: United States of America
determination method or standard: work of the federal government of the United States

captured with

Canon PowerShot S30

exposure time

0.02 second

f-number

2.8

focal length

7.09375 millimetre

File history

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Date/TimeThumbnailDimensionsUserComment
current03:24, 7 December 2006Thumbnail for version as of 03:24, 7 December 2006360 × 270 (43 KB)Dual Freq{{Information |Description=Taconite. In the United States, a hard, silica-rich iron ore called taconite (shown above) is mined in the Lake Superior region. |Source=[http://resourcescommittee.house.gov/subcommittees/emr/usgsweb/materials/images/imgTaconite

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Quelle: https://en.wikipedia.org/wiki/File:Taconite.jpg