Lead-rich sediments, Coeur d'Alene River valley, Idaho; Area, volume, tonnage, and lead content: Surface-sediment geochemical data

This metadata file (pbsamthk.met) describes two dBase4 tables.
One table (alsamPb.dbf) contains UTM coordinates for 998
surface-sediment geochemical sample sites, and concentration of
lead, in parts per million (ppm Pb), in each sample. The other table
(thkpb11.dbf) contains UTM coordinates for 428 point locations,
thickness (in centimeters) of Pb-rich sediment, and thickness-
interval weighted-average lead concentration in each stratigraphic
section of Pb-rich sediment.
These data were compiled from ten different studies referenced herein,
in which different methods were used to digest and chemically
analyze samples. Total analytical uncertainty (including uncertainty
in estimation of area, density, and Pb concentration) is estimated
at 25% or less. Median based estimates are preferred over mean based
estimates, which are unduly influenced by very high values for
thickness and lead concentration of Pb-rich sediment.