Ragnar Lidén made the first attempts to link this time scale with the present day.

Since then, there have been revisions as new sites are discovered, and old ones reassessed.

Initially, "varve" referred the separate components of annual layers in glacial lake sediments, but at the 1910 Geological Congress, the Swedish geologist Gerard De Geer (1858–1943) proposed a new formal definition, where varve means the whole of any annual sedimentary layer.

More recently introduced terms such as 'annually laminated' are synonymous with varve.

This forms a pair of layers—one coarse and one fine—for each annual cycle.Energy Link’s first electricity price forecast was published in 1997 and since then we have literally produced hundreds of up-to-the-minute forecasts of prices in both the electricity and gas markets.The forecasts are produced using complex market models, but we rely on our insight to formulate the key inputs to the models, which ultimately drive the evolution of market behaviour and prices.The classic varve archetype is a light / dark coloured couplet deposited in a glacial lake.The light layer usually comprises a coarser laminaset, a group of conformable laminae, consisting of silt and fine sand deposited under higher energy conditions when meltwater introduces sediment load into the lake water.

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