In the past several years, international interest in gas hydrates in marine sediments has
increased considerably because of increasing recognition that the large volume of gas stored
in hydrates or trapped beneath them is a significant fraction of the global methane budget,
and may therefore be a source of energy...
Examination of polished sections of manganese micronodules
from metalliferous sediments from the Bauer Deep reveals sequences
of ferromanganese deposition which are consistent for micronodules
from a single sediment sample and imply a common depositional
history for members of such assemblages. The relatively simple
'stratigraphy' of manganese micronodules, as compared to...
The Antarctic Ocean during the Cenozoic experienced four periods of increased surface productivity: the Middle Eocene; the beginning of the Miocene; the Middle Miocene; and near the Miocene-Pliocene boundary. The fourth increase in productivity began five
million years ago and has since progressively increased to the present level of intense...
Calcareous sediments containing a large percentage of foraminiferal
microskeletal tests were taken from sites in the Panama Basin
and subjected to an investigation to determine the consolidation characteristics
of this type of soil. The consolidation-stress curves and
the time rate of consolidation curves in particular were investigated
in this study....
Sediments on the inner portion of the Oregon continental shelf
consist of clean, well-sorted, detrital sand. This sand has an average
median diameter of 2.53Φ (. 173 mm) and is both positively and
negatively skewed. Deposits with median diameters in the coarse
sand and gravel classes occur at depths of...
Sedimentary records from the North Atlantic, instrumental in the development of modern paleo-geomagnetic concepts, show a highly variable field even during times of constant polarity. Yet, our understanding of how the magnetization is acquired in the sediments is poorly understood. Primary magnetizations preserved in deep-sea sediments are known to be...
We examine the interactions and feedbacks between bathymetry, waves, currents, and
sediment transport. The first two pro jects focus on the use of remote sensing techniques
to expand our knowledge of the nearshore. Due to the plethora of snap-shot data that is
available from satellites and their distribution via Google...
Major and trace element analyses were made on biogenic carbonate,
silica, and fish debris and on authigenic philhipsite, micronodules, and
yellow and brown aggregates recovered from Bauer and Roggeveen Basin
metalliferous sediments. Phase components and the bulk samples were
analyzed by INAA and MS methods. Leachates and residues from ammonium...