Overview

Ediacaran successions in Death Valley record a large negative carbon isotope excursion, but concerns about the effects of marine diagenesis and poor constraints on the age of these strata have obfuscated interpretations of the depositional environment. Our work builds off of similar research in Oman and Newfoundland, using physical sedimentology, stable isotope geochemistry, and detrital zircon provenance analyses to constrain the timing and potential causes of this carbon isotope excursion.

Publications

Creveling, J.R., Bergmann, K.D., Grotzinger, J.P., 2016, Cap carbonate platform facies model, Noonday Formation, SE California, GSA Bulletin , v. 128, B31442.1.

Bergmann, K.D., Grotzinger, J.P., and Fischer W.W., 2013, Biological influences on seafloor carbonate precipitation, Palaios, v. 28, p. 99-115.

Bergmann, K.D., Zentmyer, R.A., Fischer, W.W., 2011, The stratigraphic expression of a large negative carbon isotope excursion from the Ediacaran Johnnie Formation, Death Valley, Precambrian Research, v. 188, p.45-56.