A team of archaeologists discovered tiny microplastic particles in deposits located more than seven meters deep, in samples dating back to the first or early second century and excavated in the late 1980s.
Researchers have for the first time discovered evidence of microplastic contamination in archaeological soil samples.
Microplastics are small plastic particles, ranging from 1μm to 5mm. They come from a wide range of sources, from larger plastic pieces that have broken apart, or resin pellets used in plastic manufacturing which were frequently used in beauty products up until around 2020. "We are familiar with plastics in the oceans and in rivers. But here we see our historic heritage incorporating toxic elements. To what extent this contamination compromises the evidential value of these deposits, and their national importance is what we'll try to find out next."
The study identified 16 different microplastic polymer types across both contemporary and archived samples.
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