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"Laminae" are actually the smallest on the scale of depositional layering Awickert (talk) 05:26, 15 July 2008 (UTC)
In geotechnical terms laminae are just fine scale beds. I've logged core in which the laminae were only visible with a good hand lens and we used the term micro-laminated. The full scale was; very thickly bedded (>2m), thickly bedded(600mm to 2m), medium bedded(200mm to 600mm), thinly bedded(60mm to 200mm), very thinly bedded(20mm to 60mm), thickly laminated(6mm to 20mm), thinly laminated(2mm to 6mm), very thinly laminated(0.6mm to 2mm) and microlaminated(<0.6mm). This extended the standard BS 5930 (1999) scheme at the thinner end by two divisions. I should probably add something about this. Mikenorton (talk) 09:37, 15 July 2008 (UTC)
Wow - sorry for not getting back for so long. In geological terminology, a "bed" is colloquially used for everything, but there is an official distinction between bed and lamina at around 2 cm, I believe. But if this doesn't cross into other fields, maybe it's a semantic issue that's not worth pursuing. Awickert (talk) 00:40, 2 October 2008 (UTC)