References
- Kenneth Amor, Stephen P. Hesselbo, Don Porcelli, Scott Thackrey, and John Parnell, "A Precambrian proximal ejecta blanket from Scotland", Geology 36, 4, March 2008:pp. 303–306; doi:10.1130/G24454A.1.
Read more about this topic: Ullapool Bolide Impact