New Publication: Elucidating the relationship between the later Cambrian end-Marjuman extinctions and SPICE Event

screen-shot-2016-09-15-at-10-33-43-am

A study led by former lab group member Angela Gerhardt on the temporal relationship between a major perturbation to the marine carbon cycle (known as the SPICE) and extinctions that occurred during the late Cambrian has now been published online in the journal Palaeogeography, Palaeoclimatology, Palaeoecology. This study was the subject of Angela’s Master thesis.

Angela’s study investigated the stratigraphic relationship between the start of the SPICE and the extinctions in shallow marine communities of the trilobites and brachiopods that occurred around that time. She found that the first phase of the extinctions did not coincide with changes in the carbon cycle. However, the second and final phase of the extinctions coincided with the start of the SPICE, which suggests that the two events are mechanistically linked. Several other studies forward that the SPICE was caused by the spread of anoxia with the oceans. Therefore Angela’s findings suggest that anoxia may have been responsible for the final phase of these extinctions.

Here’s a link to paper: http://dx.doi.org/10.1016/j.lithos.2016.02.017

 

Advertisements

About BenG

Assistant Professor in the Department of Geosciences at Virginia Tech.
This entry was posted in Publications, Students and tagged , , , , . Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s