A dental drill or a carborundum paper is used in the pretreatment of shell exteriors.

spiritual intimacy in dating - Analyzing and dating geological specimens

This occurrence can make the samples seem younger than their true age.

The degree of contamination affects the magnitude of the inaccuracy in the carbon 14 dating results.

Limestone is of geological origin and would be much older than any archaeological sample; hence, inclusion of limestone during the carbon 14 dating would make the sample older than its true age.

Humic and fulvic acids are naturally present in soil where microbial degradation of plants and animals has occurred.

The pretreatment method employed depends on the type of sample and the possible contaminants.

Radiocarbon dating labs must therefore be informed of the environmental conditions and preservation techniques done to the sample before carbon-14 analysis.

Materials such as charcoal, wood, peat, and textiles typically undergo the acid-alkali-acid (AAA) method before radiocarbon dating.

Learn more Materials such as sediments and soils typically undergo acid washes (no alkali) before radiocarbon dating.

One of the basic assumptions in carbon-14 dating is that the sample being analyzed has undergone only radioactive decay and has remained unaltered by any other process over the years since it ceased interaction with the biosphere. The archaeological artifacts and geological specimens sent to labs for radiocarbon dating are usually found embedded or buried with other materials that may have affected their radiocarbon content.