File:Marcellus shale revised map 2019.png

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Description
English: Geographic extent of the Marcellus Shale (outcrop and, mainly, subcrop) and its shale gas play in the northeastern U.S.
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Own work
The map was created using QGIS, with minor revisions using Adobe Photoshop (compressed at tinypng.com before upload).
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All data are either originally published/provided by the U.S. federal government (EIA, USCB) and thus are in the public domain or are generated by Open StreetMap contributors and distributed under the Open Database 1.0 License which allows free use, modification and re-distribution. Shapefiles provided at Natural Earth are also in the public domain according to that site’s terms of use.
Author Gretarsson

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I, the copyright holder of this work, hereby publish it under the following license:
w:en:Creative Commons
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Date/TimeThumbnailDimensionsUserComment
current11:35, 24 August 2019Thumbnail for version as of 11:35, 24 August 20192,820 × 2,480 (534 KB)Gretarsson (talk | contribs){{Information |description ={{en|1=Geographic extent of the Marcellus Shale (outcrop and, mainly, subcrop) and its shale gas play in the northeastern U.S.}} |date =2019-08-23 |source ={{own}} |author =User:Gretarsson }} Category:Marcellus Shale

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