|  |  |  | 
|   
 
   | 
|  |  | Natland, James H.; Rosendhal, Bruce; Hekinian, Roger; Dmitriev, Yuri; Fodor, Ronald V.; Goll, Robert M.; Hoffert, Michel; Humphris, Susan E.; Mattey, David P.; Peterson, Nikolai; Roggenthen, William; Schrader, Edward L.; Srivasiava, Ramesh K.; Warren, Nick. |  | The Galapagos mounds sea-floor hydrothermal system is at least 300,000 years old and once produced manganese-poor sediments, which nearly blanketed the area of the present mounds field. Present-day mound deposits are limited manganese-rich exposures, suggesting that the system has changed from rock- to water-dominated and has diminished in intensity with time. [NOT CONTROLLED OCR] |  
| Tipo: Text | Palavras-chave: Histoire Ifremer. |  
| Ano: 1979 | URL: http://archimer.ifremer.fr/doc/1979/publication-5382.pdf |  |  |  |  |  |