The Rockall High, Hatton Basin and Hatton High
The Rockall Plateau is an elevated topographical subsea feature, rising above sea level only at the islet of Rockall. It is a microcontinent, underlain by continental crust, bounded to the west, NW and south by North Atlantic oceanic crust, and to the east by the thinned continental crust and oceanic crust underlying the Rockall Trough. The Rockall Plateau comprises the upstanding topographical features of Rockall Bank and Hatton Bank, separated by the Hatton Basin. The Edoras Bank forms the southern boundary of the Hattion Basin, connecting the Rockall Bank and Hatton Bank (Fig. 170). Rockall Bank overlies the Rockall High, formed by continental (Precambrian) basement. Hatton Bank overlies the Hatton High, apparently formed by Palaeozoic? and Mesozoic sediments. In the intervening Hatton Basin (formerly the Hatton-Rockall Basin), a thick section of presumed Mesozoic sediments underlies a sedimentary Cenozoic section.