Figure F4. Hydrothermal sites and distribution of hydrothermal deposit types at the PACMANUS field on the crest of Pual Ridge, showing the position of ODP Sites 1188, 1189, 1190, and 1191. Roman Ruins, Satanic Mills, Tsukushi, and Rogers Ruins (the small field north from Roman Ruins) are sites of high-temperature focused venting with sulfide chimneys. Snowcap is a field of exposed altered rocks with diffuse low-temperature venting. Numerous small fields of Fe-Mn-Si oxides scattered along the ridge (overlying dacite-rhyodacite lavas in blank areas) are not shown. Isobaths are in meters below sea level.