Database fields in category Sample characteristics

	Distribution maps
Label	Lower 48	Alaska	Hawaii	Statistics	Description
`FLDNAM`					Field name of sample, possibly corrected after laboratory analysis.
`COLL_DATE`					Day on which the sample was collected in the field
`DESCRIPT`					Sample description and field notes
`STYPE`					3-digit code for the sample medium and collection protocol
`SOIL_HORIZ`					Soil horizon from which the sample was collected (soils only).
`COLOR`					Observed color of powdered sample during splitting, prior to USGS analysis
`SMPGRSIZE`					Grain size of material collected in the field (descriptive)
`MEDIUM`					Sample medium (rock, sediment, standard, or unknown)
`SOURCE`					Geological source of the sample medium that was collected
`SOURCE_MOD`					Adjective describing sample source
`UPSIEVE`					Sieve size (micrometers) through which sample passed prior to analysis
`DRIED`					Manner in which sample was dried prior to analysis
`STYPENOTE`					Notes relevant to medium, source, source_mod, upsieve, and dried fields