Supplemental material: Age constraints on alleged "footprints" preserved in the Xalnene Tuff near Puebla, Mexico
journal contributionposted on 01.01.2009 by J. Feinberg, et al.
Any type of content formally published in an academic journal, usually following a peer-review process.
GSA Data Repository Item 2009068, Geology, Vol. 37, p. 267. File size: 11 p., about 433 KB.