Rockall part of the deeply eroded Rockall Igneous Centre that was formed as part of the North Atlantic Igneous Province, approximately 55 million years ago, when the ancient continent of Laurasia was split apart by plate tectonics. Greenland and Europe separated and the northeast Atlantic Ocean was formed between them, eventually leaving Rockall as an isolated islet. The RV "Celtic Explorer" surveyed the Rockall Bank in 2003. The Irish Light Vessel "Granuaile" (the same name as the steamer on the RIA 1896 botany survey) was chartered by the Geological Survey of Ireland, on behalf of the Department of Communications, Marine and
Rockall expedition made a brief attempt to return to the ship, but could not find the frigate in the haze, and soon gave up and returned to Rockall. After the haze became a fog, the lookout sent to the top of Rockall spotted the ship again, but it turned away from Rockall before the expedition in their boats reached it. Finally, just before sunset, the frigate was again spotted from the top of Rockall, and the expedition was able to get back on board. The crew of the "Endymion" reported that they had been searching for five or six hours, firing