Gunnbjörn's skerries (Gunnbjarnarsker) were a group of small skerries lying close between Iceland and Greenland, discovered by Gunnbjörn Ulfsson in the 9th century. They became a popular stopover for ships traveling to Greenland and a brief attempt to set up a colony was made about 970. Snæbjörn Galti visited around 978. A later attempt succeeded and by 1391 there were 18 farms on the islands. Apparently in 1456, according to Ruysch, the islands "completely burned up", i.e. were blown up. On later maps, as late as 1700, the shoals formed by the remains of the explosion was noted with the name "Gombar Scheer".
- Ramsay, Raymond (1972). "Appendix II: Sunken Islands near Iceland". No Longer on the Map. New York: Viking Press. pp. 246–7. ISBN 0-670-51433-0.
- Rupin, Charles (1970). Les idées économiques de Sully et leurs applications à l'agriculture, aux finances, et à l'industrie (in French). Ayer. pp. 75–76. ISBN 0-8337-3096-7, 9780833730961 Check