Unidad estratigráfica (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Unidad estratigráfica" in Spanish language version.

refsWebsite

Global rank Spanish rank

3books.google.com

3^rd place

7^th place

3stratigraphy.org

2,562^nd place

1,282^nd place

167^th place

98^th place

books.google.com

Mathur S.M. (2008). Elements of Geology. pp. 129-130. ISBN 978-8120335158.
Brookfield M.E. (2008). Principles of Stratigraphy. John Wiley & Sons. p. 200. ISBN 978-0470693223.
Thierry J.; Galeotti S. (2008). «Biostratigraphy from taxon to biozones and biozonal schemes». En Rey J.; Galeotti S., eds. Stratigraphy: Terminology and Practice. Editions OPHRYS. pp. 64-73. ISBN 9782710809104.

stratigraphy.org

«Chapter 5. Lithostratigraphic Units». International Commission on Stratigraphy. 2013–2014. Consultado el 4 de junio de 2014.
«International Commission on Stratigraphy». stratigraphy.org. Consultado el 24 de junio de 2021.
«Chapter 7. Biostratigraphic Units». International Commission on Stratigraphy. 2013–2014. Consultado el 4 de junio de 2014.

usgs.gov

ngmdb.usgs.gov

2004 North American Commission on Stratigraphic Nomenclature (2005). «North American Stratigraphic Code». American Association of Petroleum Geologists Bulletin, v. 89, no. 11: 1567-1570. Consultado el 13 de junio de 2020. «The wedge-out of a component formation or formations may justify the reduction of a group to formation rank, retaining the same name.»