The role of grain size in embrittlement of archaeological silver

Archaeological silver may be embrittled by long-term corrosion and microstructural changes. The embrittlement of artifacts increases with increasing grain size. This is explained by considering the grain boundary character and models describing the interactions between microcracks, lattice dislocations and grain boundaries. Severely embrittled...

Grain-size and gradation effects on sediment transport under sheet-flow conditions: Part 2: data-analysis and modelling

Sediment transport for two sands with different grain diameters under combined wave-current sheet flow conditions, part I: Data report

A reconnaissance heavy mineral study of Monteray Bay beach sediment

The shoreline of Monterey Bay is beached over most of its length. The beach is essentially continuous except for the northern and southern ends of the bay which are characterized by numerous pocket beaches separated by narrow cliffed areas which extend to beyond the low water level. There appears to be no large supply of sand to the beaches at...

Coastal sedimentation: Point San Pedro to Miramontes Point, California

The distribution and dispersal patterns of sand-size particles has been investigated along a portion of the California coast south of San Francisco. The effectiveness of long-term, net littoral transport in the area has been evaluated through hydrodynamic considerations and through considerations of the dispersal patterns of sand. The...

Source and distribution of sediments at Brunswick harbor and vicinity, Georgia

The distribution patterns of bottom sediment in Brunswick Harbor and vicinity, Georgia, reflect the long-term hydrodynamic response and generally correlate with dynamic factors affecting edimentation. Certain diagnostic minerals reflect the source area and are used as "natural tracers" to delineate direction of sediment movement. Analysis of...