Turbidites of the Upper Cretaceous Chugach terrane of southern Alaska were deposited in a trench during northward-directed subduction. The fault-bounded outcrop belt of the Chugach terrane is about 2000-km long and 100-km wide and was accreted to Alaska during the Cenozoic. Turbidites are at least 5000 m thick, are extensively deformed, have been regionally metamorphosed, and have been intruded by anatectic granites. Facies associations indicate an east-to-west progression from inner-fan to middle-fan, outer-fan, fan-fringe, and basin-plain deposits. To the north is a marginal trench-slope facies association and a basin. ?? 1984 Springer-Verlag New York Inc.
|Title||Trench-fill submarine-fan facies associations of the Upper Cretaceous Chugach terrane, southern Alaska|
|Authors||T. H. Nilsen|
|Publication Subtype||Journal Article|
|Series Title||Geo-Marine Letters|
|Record Source||USGS Publications Warehouse|