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Not the ones you eat. Mercury levels are high in late Cretaceous fossil shellfish. The shellfish can indicate sea temperatures with a special carbonate analysis too. So researchers can compare rising mercury from the Deccan Traps eruptions to rising temperatures at the same time. Surprisingly high levels of mercury contamination occurred.

 

https://m.phys.org/news/2019-12-fossil-shells-reveal-global-mercury.html

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e.g.

s41467-019-13366-0.pdf

Biogenic carbonate mercury and marinetemperature records reveal global influence of Late Cretaceous Deccan Traps
Kyle W. Meyer , Sierra V. Petersen, Kyger C Lohmann, Joel D. Blum, Spencer J. Washburn

NATURE COMMUNICATIONS | (2019) 10:5356 | https://doi.org/10.1038/s41467-019-13366-0 |www.nature.com/naturecommunications

 

hg10y00 (2).jpg

 

 

NOT among the references,but,hey.................

Mercury emissions and stable isotopic compositions at Vulcano Island (Italy)
T. Zambardi , J.E. Sonke , J.P. Toutain  F. Sortino , H. Shinohara

Earth and Planetary Scence Letters

Article history:
Received 23 June 2008
Received in revised form 15 October 2008
Accepted 20 October 2008

 

 

HgVulcano.pdf

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Enjoy! Forgot to mention that the comparison between fossilized shells and modern day shells found in the Shenandoah Valley, VA. My state is Va, so this is kind of a big deal because nothing interesting happens here.

Edited by T. nepaeolicus
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Topics merged. ;) 

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On 12/17/2019 at 5:34 PM, Fossildude19 said:

Topics merged. ;) 

Thanks again Tim:dinothumb:

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