词汇 | accretionary |
释义 | BETA Examples of accretionaryaccretionary isn’t in the Cambridge Dictionary yet. You can help! Concentrations of accretionary lapilli and diffuse trains of small pumices define bedding in this thick ash bed. With continuing subduction the pelagic sediments might have been dragged beneath the accretionary prism leading to compaction and expulsion of large amounts of pore fluids. The isolated exposures of the accretionary lapilli-bearing facies along the coastline may alternatively record shoreline or water interaction of pyroclastic flows. The pumice bedforms are mantled by an accretionary lapilli-bearing ash bed and stratification in the overlying lithic-rich bed. Discontinuous ash layers (< 2 cm thick) with accretionary lapilli, separate the three massive beds in exposures near the coast. The origin and accretionary history of the continental crust has long been debated by earth scientists. The steady state thermal structure of eroding orogenic belts and accretionary prisms. Accretionary lapilli are abundant in the upper part of the subunit, where low-angle cross-stratification is also observed. The eclogites must have been injected into the accretionary prism prior to the terminal continental collision. Western basins in this accretionary prism are probably younger than the eastern ones. The accretionary complex is made up of basalt, radiolarian chert and serpentinite with minor turbidite. Individual basins with ophiolitic provenance and overlying coarse detritus were uplifted and became part of the accretionary complex. At least four major eruptions of the third cycle began with phreatomagmatic activity, producing lithic-poor, accretionary lapilli-bearing fallout and/or surge deposits. In thrust-and-fold belts and accretionary prisms, an oblique convergence vector across the margin can also generate these geometric features. The quartzites contain metre-scale cross-stratification which can be traced for tens of metres in the accretionary direction. |
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