Rougerie Francis, Fagerstrom J.A. (1994). Cretaceous history of Pacific basin guyot reefs : a reappraisal based on geothermal endo-upwelling. Paleogeography, Palaeoclimatology, Palaeoecology, 112, p. 239-260. ISSN 0031-0182.
Titre du document
Cretaceous history of Pacific basin guyot reefs : a reappraisal based on geothermal endo-upwelling
Année de publication
1994
Type de document
Article
Auteurs
Rougerie Francis, Fagerstrom J.A.
Source
Paleogeography, Palaeoclimatology, Palaeoecology, 1994,
112, p. 239-260 ISSN 0031-0182
The mid-cretaceous histories (origin, growth, death) of algal-rudist-stromatoporoid reef communities located on many Pacific basin guyots are complex and controversial. These shallow water, tropical communities originated on volcanic edifices extruded during the Barremian-Albian, grew upward during edifice subsidence/trangression throughout the Aptian, Albian and Cenomanian and several of them died almost synchronously near the Cenomanian-Turonian boundary. During their periods of origin and growth, we postulate that the reef ecosystem received dissolved oxygen by wave surge and nutrients by geothermal endo-upwelling. By this process oceanic waters of intermediate depth (approx. 500-1500m) were : (a) drown into the weathered and fractured volcanic summit and lower part of the older reef and driven upward through the porous framework bythe remnant geothermal gradient of the volcanic foundation and (b) emerged atthe reef surface to support the high metabolism of the living community. (D'après résumé d'auteur)
