http://library.coastweb.info/4888/ Offshore continuation of volcanic rift zones, El Hierro, Canary Islands Gee, M.J.R. Masson, D.G. Watts, A.B. Mitchell, N.C. El Hierro is the youngest and most southwesterly of the seven Canary islands. The established view, based on subaerial geology, is that El Hierro is a classic example of an oceanic island with 120° –– spaced volcanic rift arms (VRZs) forming a "merce 2001 Article PeerReviewed http://dx.doi.org/10.1016/S0377-0273(00)00241-9 Gee, M.J.R., Masson, D.G., Watts, A.B. and Mitchell, N.C. (2001) Offshore continuation of volcanic rift zones, El Hierro, Canary Islands. Journal of Volcanology and Geothermal Research, 105 (1/2). pp. 107-119. http://library.coastweb.info/4888/