Showing papers in "Marine Geology in 1988"

TL;DR: Pore water chemistry (total dissolved CO 2, NH 4, NO 3, NO 2, PO 4, Si(OH) 4, Ca, Mg, Fe, Mn, SO 4, H 2 S and F, and titration alkalinity) and sediment characteristics (porosity, dry bulk density and formation factors) were determined on a centimeter-scale spacing in the upper 20-40 cm of sediments under intense upwelling areas on the Peru continental shelf as discussed by the authors.

TL;DR: The Second Storegga Slide on the continental slope off western Norway has been dated at between 8000 and 5000 yrs B.P. as mentioned in this paper, and the altitude and stratigraphy of the layer allow estimates to be made of the magnitude of the earthquake which initiated the slide.

TL;DR: Bulk metal concentrations were measured in the sediments of Saanich Inlet in an attempt to establish the occurrence of trace metal enrichment in the anoxic central basin Ba, Ni, V, Cr, Zn, Pb, Cu and Mo as mentioned in this paper.

TL;DR: In this paper, the authors have sampled Fe oxide mud, nontronite, and Fe-Mn crusts from the summits of two seamounts in the eastern Pacific.

TL;DR: In this paper, a sediment budget for Chesapeake Bay was constructed and a variety of wetland types was used to assess the trapping ability of marshes in large estuaries, which indicated that estuarine marshes trap 5-11% of the annual Chesapeake bay sediment input.

TL;DR: In this paper, 20 marine terraces between Corinth and Xylokastro have been used to study the interaction of the northern Peloponnese uplift and the global eustatic sea-level fluctuations during the last 500,000 years.

TL;DR: In this paper, the authors determined diatom abundance and assemblage composition for 169 surface sediment samples from the Portuguese margin, an area where seasonal upwelling occurs each year from April to October.

TL;DR: In this article, the authors present petrographic and major element geochemical data from modern Peru margin upper slope-outer shelf phosphorites, which provide insight into their origin and paragenetic relationship with other authigenic minerals (glauconite, pyrite, and dolomite) occurring in organic-rich sediments.

TL;DR: In this article, the BZ index was used to measure the productivity of deep-sea foraminifera in hemipelagous and pelagic conditions, where the effects of differential dissolution were excluded and the benthic to planktonic ratio was read as a productivity index.

TL;DR: Pollen analysis of 84 samples from surface sediment of the continental margin off northern California (between 38° and 39°N and 123° and 124°W) shows that the composition of pollen assemblages in this part of the North Pacific Ocean reflects the regional vegetation of the Russian River and other local drainage basins of the northern coast of California as discussed by the authors.

TL;DR: In this paper, the authors studied seven volcanic edifices of Cretaceous age along the Ratak chain of the Marshall Islands and found that the most abundant substrate lithologies were limestone, dominantly fore-reef slope deposits, and volcanic breccia composed of differentiated alkalic basalt and hawaiite clasts in a phosphatized carbonate matrix.

TL;DR: A field experiment to investigate the magnitude and temporal and spatial scales of suspended sediment transport in the inner surf zone was conducted at San Marine, Oregon on October 7-13, 1984 as mentioned in this paper.

TL;DR: The role of mud banks was documented by vertical aerial photographs taken in 1979, 1982 and 1984 as discussed by the authors, which allow the delineation of the intertidal parts of the banks at low tide and at identical tidal ranges.

TL;DR: In this article, the authors studied sediment transport processes on the escarpment of a listric fault in the tectonically active and terrigenous sediment-dominated Corinth graben in Greece using 3.5 kHz and airgun profiles and sidescan sonar images.

TL;DR: In this paper, a classification of nine types of sulfide assemblages is proposed, including high-temperature hydrothermal Cu-Fe-rich chimneys (black smokers), which are characteristic structures of young edifices, to mature Cu-fe-rich massive sulfides similar to those found in the core of massive sulfide lenses mined on shore.

TL;DR: A 3 MHz acoustic concentration meter (ACM) was deployed with electromagnetic flowmeters in the nearshore region in October 1984 at Stanhope Lane, Prince Edward Island, Canada, as a component of the Canadian Coastal Sediment Study as mentioned in this paper.

TL;DR: In this paper, the authors used historical records from tide gauges in Israel and Egypt to supplement the many geological and archeological investigations that have contributed information about relative sea-level changes in the Mediterranean region.

TL;DR: In this paper, five Lake Erie bluffs (one interlaminated clay and silt, three clay-rich diamicts and one shale) were surveyed at about 2-week intervals and after wind storms for up to 5 years.

TL;DR: The Caminada-Moreau barrier headland of South Louisiana is a low-profile beach and dune coastline that is transgressing rapidly over the surfaces of the abandoned Lafourche delta complex.

TL;DR: In the Weddell Sea, a clockwise gyre is formed by mixing along the southern and western margins as mentioned in this paper, with hemipelagic muds with ash laminae and distal turbidites derived from the southwest.

TL;DR: In this paper, an in-depth investigation was made of beach gravel fabrics at two beach sites located on the Glamorgan Heritage Coast, Wales, U.K. Granulometric data from 31,080 pebbles were obtained and analysis confirmed the existence of a basic shape differentiation structure when the B-axis was used at Gileston Beach and Nash Beach.

TL;DR: In this paper, the depositional history of Quaternary sediments on the continental shelf off the southeastern coast of Korea (Korea Strait) was investigated by means of analysing high-resolution seismic profiles and sediment samples.

TL;DR: Using three methods of measurement, and averaging over the whole estuary, the vertical sediment accretion on mature clastic salt marshes amounts to 1.6-1.7 m.

TL;DR: A detailed field mapping of the plutonic sequence and sheeted dyke complex in several areas of the Sumail Ophiolite Nappe, mainly in the Haylayn Block (Wadi Haymiliyah area) and comparisons with other well-studied areas has shown that early hydrothermal circulation affected the whole crust, down to the petrological Moho as discussed by the authors.

TL;DR: In this article, the authors describe the morphology and dynamics of features termed here "longshore sandwaves" which are developed on a large barrier spit in the Great Lakes. The sandwaves are local beach protuberances with alongshore lengths of 500-2500 m and maximum widths at the downdrift end of 50-90 m, which migrate alongshore in the direction of net drift at 150-300 m yr−1.

TL;DR: In this article, the authors present sedimentary conditions in the prodeltaic marine area immediately in front of the Po della Pila (Po River main mouth) are characterized by a maximum thickness of Holocene muds of 10-12 m at a depth of 20-25 m and by two different sedimentary cycles, with the more recent lens-shaped unit (2.5-4.0 m) probably deposited in the last 300 yrs.

TL;DR: In this paper, a time series of suspended sediment flux across a tidal flat covering a full spring neap tidal cycle is presented, showing that net transport of sediment in a landward direction is mainly caused by flocculation of fine-grained sediment during periods of high concentration level.

TL;DR: In this article, suspended sediment concentrations in the southeastern Yellow Sea range from 5 −100 mg l−1 at the surface and 5 −500 mg l − 1 at the bottom and the highest concentrations occur off the southwest tip of the Korean Peninsula and the lowest occur in the central part of the Korea Strait.