This is a TREMENDOUS discovery, and thanks for adding some links to "snowball Earth"/ Continental Drift stories.
Greenland being "old" does not surprise me. That Greenland has been able to preserve 3.8Byo material is astonishing!
The "Professor Moores" mentioned in this article is a pioneer in this field and is well respected. Congratulations to him and his team!
:') You're most welcome.