Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Plot of the isotopic composition of the pyrite sulfur (δ34S) in the fossiliferous portion of the Chengjiang from a new drill core extracted near Haikou town, Kunming, Yunnan Province, China. Event-deposited beds (blue diamonds) are characterized by heavy values [average +9.6 ± 2.0‰ (SEM)] that display less fractionation from Cambrian seawater (ca. +30‰; ref. 31) than background sediments [orange circles; average -6.0‰ ± 0.6‰ (SEM)].
