Pennsylvanian (geology) (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Pennsylvanian (geology)" in English language version.

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books.google.com

dictionary.com

doi.org

doi.org

dx.doi.org

nmt.edu

geoinfo.nmt.edu

palaeos.com

stratigraphy.org

  • "Chart/Time Scale". www.stratigraphy.org. International Commission on Stratigraphy.
  • Lane, H.; Brenckle, Paul; Baesemann, J.; Richards, Barry (December 1999). "The IUGS boundary in the middle of the Carboniferous: Arrow Canyon, Nevada, USA" (PDF). Episodes. 22 (4): 272–283. doi:10.18814/epiiugs/1999/v22i4/003. Retrieved December 8, 2020.
  • Davydov, Vladimir; Glenister, Brian; Spinosa, Claude; Ritter, Scott; Chernykh, V.; Wardlaw, B.; Snyder, W. (March 1998). "Proposal of Aidaralash as Global Stratotype Section and Point (GSSP) for base of the Permian System" (PDF). Episodes. 21: 11–18. doi:10.18814/epiiugs/1998/v21i1/003. Retrieved December 7, 2020.

tolweb.org

uab.cat

ddd.uab.cat

ucm.es

revistas.ucm.es

usgs.gov

pubs.usgs.gov

  • Rice, Charles L. "Pennsylvanian system". Contributions to the geology of Kentucky. United States Geological Survey. Retrieved October 26, 2020.

web.archive.org

worldcat.org