Question: do you know what is more microscopic than clay?

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  1. Clay particles are VERY small (less than 0.002 mm), so there aren’t any kinds of soil that are smaller. However, there are LOTS of non-geological things that are a LOT smaller, like DNA (2 nanometers wide), for instance. So, really, it depends on what you would like to compare your clay to! 🙂

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