Oligocene sea-level falls recorded in mid-Pacific atoll and archipelagic apron settings

Abstract

Research Article| May 01, 1986 Oligocene sea-level falls recorded in mid-Pacific atoll and archipelagic apron settings S. O. Schlanger; S. O. Schlanger 1Department of Geological Sciences, Northwestern University, Evanston, Illinois 60201 Search for other works by this author on: GSW Google Scholar I. Premoli Silva I. Premoli Silva 2Department of Earth Sciences, Paleontology Section, University of Milan, Milan, Italy Search for other works by this author on: GSW Google Scholar Author and Article Information S. O. Schlanger 1Department of Geological Sciences, Northwestern University, Evanston, Illinois 60201 I. Premoli Silva 2Department of Earth Sciences, Paleontology Section, University of Milan, Milan, Italy Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1986) 14 (5): 392–395. https://doi.org/10.1130/0091-7613(1986)14<392:OSFRIM>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation S. O. Schlanger, I. Premoli Silva; Oligocene sea-level falls recorded in mid-Pacific atoll and archipelagic apron settings. Geology 1986;; 14 (5): 392–395. doi: https://doi.org/10.1130/0091-7613(1986)14<392:OSFRIM>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Drilling results from mid-Pacific atoll and archipelagic apron sites in the Line Islands and Marshall Islands provinces lead to the conclusion that Oligocene sea-level falls detected in Atlantic passive margin sequences are also recorded in a mid-plate-tectonic setting in the Pacific Basin. The mid-Pacific sea-level falls are recorded by (a) the presence of distinct, coarse-grained, graded beds of turbidite origin, rich in reef-derived skeletal debris of Oligocene, Eocene, and Cretaceous age, that were redeposited in deep-water archipelagic apron carbonate sequences of middle and late Oligocene age now flanking the atolls and (b) a marked stratigraphic hiatus and solution unconformity in the subsurface of Enewetak atoll which dates an Oligocene period of atoll emergence correlative with both the deposition of the turbidites and the coastal offlap events discerned in Atlantic passive margins. Correlation of the subsidence path of Enewetak atoll with the development of the Oligocene solution unconformity shows that ca. 30 Ma sea level was as much as 100 m lower than at present. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.