EarthRef.org Reference Database (ERR) -- Engel & Engel 1970

Engel, A.E. and Engel, C.G. (1970). Volcanic rocks dredged southwest of the Hawaiian Islands. United States Geological Survey, Professional Paper P 0550-D: D104-D108.

Dredging in a seamount province southwest of the Hawaiian Islands confirms earlier conclusions concerning the association of tholeiitic and alkalic basalts on the ocean floor. Rocks dredged from a small volcano on a major geomorphic, structural, and magnetic lineament which separates contrasting oceanic provinces, consist of tholeiitic basalt related in composition to the Hawaiian tholeiites. Alkali-rich basalt, and other alkalic rocks including hornblende-bearing varieties and a rare biotite trachyte, were dredged from adjacent and nearby large submarine volcanoes south of the lineament. Spatial relations of the rocks in this part of the Pacific Ocean substantiate the hypothesis that in the oceans, volcanic rocks of the alkali series are confined to, and are ideally developed on, large volcanoes.