砂

• Fluviatile sands deposited by delta distributaries are quartzose .
  三角洲分流中沉积的河流砂是石英质的。
• Channel and point-bar sands may be clean and well-sorted .
  河道砂和河曲沙坝砂可以是干净的和分选良好的。
• The sand is separated from the silt and clay by wave sorting .
  砂粒在波浪分选作用下从粉砂及粘土中分出。
• These elongate sand bodies are attached to a bulge of the mainland .
  这些长条形砂体连接于主陆的突出部位。
• Accumulations of trash and silt should be near the primary element .
  泥砂和废料的淤积要逐渐靠拢基本元件。
• These units are employed as grit arrester on small cupola .
  这种装置在小型冲天炉中是作为砂粒分离器使用的。
• The further growth of a bar is due to a lowering of sea level .
  砂洲的进一步生长是由于海平面正在下降的结果。
• These may range from coarse silt to sand or pebble size .
  这些颗粒的大小变化范围，从粗粉砂级到砂级或细砂级。
• Thin layers of sandy shale, and carbonaceous fragments are locally present .
  局部出现砂质页岩薄层和碳质碎屑。
• The channel is filled with noncompactible sand, or with sand and gravel .
  水道内由不可压实的砂或砂砾物质充填。