TABLE 2. CORRELATION OF COMPOSITE SECTIONS 
The terms "dust,” "sand,” "gravel,” and "rubble" refer to beds of crystal and lithic fragments, graded somewhat as to size of particle; the terms "ash,” 
"shard,” and "pumice" refer to beds of primary vitric fragments, graded similarly as to size. "Piso” denotes pisolitic structure of the fine materials, "agg" 
refers to an unsorted aggregate of lithic fragments ranging from dust to large blocks, and "pum agg” refers to rare beds of vitric lapilli which contain a few 
lithic blocks. Breaks between layers are represented by symbol lines as follows: breaks in deposition.desert surface ?$$$$$*; humus or soil surfacesSSSS. 
