Tham khảo Tầng_Piacenza

  1. “ICS Timescale Chart”. www.stratigraphy.org.
  2. “Global Boundary Stratotype Section and Point”. International Commission of Stratigraphy. Truy cập ngày 22 tháng 12 năm 2020.
  3. See for a detailed geologic timescale Gradstein et al. (2004)
Văn liệu

Tài liệu tham khảo

WikiPedia: Tầng_Piacenza http://stratigraphy.science.purdue.edu/charts/Time... http://www.foraminifera.eu/querydb.php?stage=Piace... http://pubs.usgs.gov/fs/2007/3015/fs2007-3015.pdf //doi.org/10.1016%2F0377-8398(95)00051-8 //doi.org/10.1017%2FCBO9780511536045 //doi.org/10.18814%2Fepiiugs%2F1998%2Fv21i2%2F002 //doi.org/10.18814%2Fepiiugs%2F1998%2Fv21i2%2F003 http://www.stratigraphy.org/ICSchart/ChronostratCh... http://www.stratigraphy.org/index.php/ics-chart-ti... https://web.archive.org/web/20060518100615/http://...