The term BOX DEPOSIT is a geological term that refers to the accumulation of sedimentary material in a box-like structure. The crossword solutions SILT (4 letters), LODE (4 letters), and LOESS (5 letters) all refer to different types of sedimentary material that can be found in a box deposit. SILT is a type of fine-grained sediment composed of clay, SILT, and sand particles. LODE is a type of ore deposit that forms when minerals are concentrated in a vein or fissure. Loess is a type of sedimentary material composed of wind-blown dust and SILT.