Меловой период

Tedeschi, L. R., Jenkyns, H. C., Robinson, S. A., Sanjinés, A. E., Viviers, M. C., Quintaes, C. M., & Vazquez, J. C. (2017). New age constraints on Aptian evaporites and carbonates from the South Atlantic: Implications for Oceanic Anoxic Event 1a. Geology, G38886-1.

http://geology.gsapubs.org/content/earl ... 1.full.pdf