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Text Description: Not a visible tephra layer: cryptotephra. 279–285 cm depth in core. Colourless, highly vesicular, bubblewall and non-vesicular angular glass shards. Their maximum measured length is 100 microns, the median being <45 microns. About 60% of the shards have characteristic feldspar microlite crystals up to 20 microns long, occurring in all types of glass shards References:  Linking the North Atlantic to central Europe: A high-resolution Holocene tephrochronological record from northern Germany |
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