Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 4 of 4
Full-Text Articles in Entire DC Network
Late Quaternary Facies And Sea Level History, Southwest Louisiana Continental Shelf., John Robert Suter
Late Quaternary Facies And Sea Level History, Southwest Louisiana Continental Shelf., John Robert Suter
LSU Historical Dissertations and Theses
Abstract Not Available.
Mud Deposition At The Shoreface: Wave And Sediment Dynamics On The Chenier Plain Of Louisiana., George Paul Kemp
Mud Deposition At The Shoreface: Wave And Sediment Dynamics On The Chenier Plain Of Louisiana., George Paul Kemp
LSU Historical Dissertations and Theses
Sedimentological data, and high-resolution current velocity time-series were acquired nearshore along the muddy coast of Louisiana's chenier plain. Results suggest that the 2 to 10 cm thick, laminated and graded silt/shell + mud beds which characterize shoreface mudflat sedimentation form through intermittent dumping of fluid mud suspensions. Cohesive and non-cohesive sediments are first separated and concentrated by shear within a wave boundary layer (WBL). Rapid sedimentation, or "freezing", of the mud fraction occurs when the yield strength of the fluid mud suspension equals that of the WBL shear stress. Incident waves were well described by shallow water linear wave theory, …
Sedimentology And Stratigraphy Of The Fig Tree Group, West Limb Of The Onverwacht Anticline, Barberton Greenstone Belt, South Africa., Bruce William Nocita
Sedimentology And Stratigraphy Of The Fig Tree Group, West Limb Of The Onverwacht Anticline, Barberton Greenstone Belt, South Africa., Bruce William Nocita
LSU Historical Dissertations and Theses
Sedimentary rocks of the 3.2-3.2 Ga old Fig Tree Group in the southwest part of the Barberton Greenstone Belt in South Africa can be divided into three informal formations. The lowest unit, Formation A, is composed mostly of silicified pyroclastic debris and carbonaceous cherts. Formation B has four lithofacies--siltstone; sandstone; jaspilite; and bedded barite. Two coarse-grained lithofacies make up Formation C. In the western portion of the study area there is chert-clast conglomerate and in the eastern part of the study area is volcanic-clast conglomerate, breccia, and sandstone. In the western portion of the study area Formations B and C …
Stratigraphy, Sedimentology, And Sedimentary Petrology Of The Early Archean Coongan Formation, Warrawoona Group, Eastern Pilbara Block, Western Australia (Sandstones, Precambrian)., Michael J. Dimarco
Stratigraphy, Sedimentology, And Sedimentary Petrology Of The Early Archean Coongan Formation, Warrawoona Group, Eastern Pilbara Block, Western Australia (Sandstones, Precambrian)., Michael J. Dimarco
LSU Historical Dissertations and Theses
The Coongan Formation, defined and described here, is an approximately 3.5 Ga-old unit of felsic volcanic and volcaniclastic rocks, representing a major episode of early Archean felsic volcanism, in the predominantly basaltic Warrawoona Group, eastern Pilbara Block, Western Australia. The Coongan Formation is divided into three members: the Duffer and Panorama Members and the Strelley Pool Chert. The oldest and volumetrically greatest part of the Coongan Formation is the Duffer Member, which consists largely of volcaniclastic breccia, conglomerate, tuff, and felsic lava. Vertical sequences, up to 5 km thick, indicate that the Duffer Member represents coarse-grained, shoaling-upward debris-aprons that flanked …