PittsburghCoalExtent.png
Size of this preview:
640 × 600 pixels
.
Other resolutions:
256 × 240 pixels
|
846 × 793 pixels
.
Summary
Description PittsburghCoalExtent.png |
English:
Original Caption: "Map of the Horizon of the Pittsburgh Coal Bed in Pennsylvania, West Virginia and Ohio -- The Maryland deposit is excluded. It will be noted in the illustration that in West Virginia there is a line which shows where the Pittsburgh bed becomes thin and of little commercial value. While some of the deposits west of that line in Ohio are of considerable value, many are utterly valueless, and some are mere traces. In other places, the bed is missing and its horizon alone can be determined. As this is a map covering the horizon of the coal bed and not its actual presence, the profitable coal area, especially in Ohio and West Virginia, will be considerably smaller than that shown."
|
Date | |
Source | The Pittsburgh Coal Bed, Coal Age , Vol. 5, No. 11 (March 14, 1914); page 441. |
Author | Wilbur G. Burroughs |
Licensing
Public domain Public domain false false |
This media file is in the
public domain
in the
United States
. This applies to U.S. works where the copyright has expired, often because its first
publication
occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See
this page
for further explanation.
|
||
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the
rule of the shorter term
for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See
Wikipedia:Public domain
and
Wikipedia:Copyrights
for more details.
|