Like the sediment series, the TILL samples are characterised for major element oxides, total elements as well as elements from partial extractions. In addition, informational data from a single source are provided for a number of elements derived by EPA digestions 3050 and 3051. Nevertheless, the provisional values should represent good approximations to the true values.
Samples represent different geological areas of Canada.
At this location, extensive trenching had been done by the mining company who owned the property in order to expose the till. The company had obtained preliminary analyses of till samples collected at various sites within the trenched areas. These analyses were used as guidelines to sampling. No effort was made to collect any particular horizon. In order to augment the molybdenum levels in TILL-4, a small quantity of a molybdenite bearing soil was collected near an old test pit.