The basal, coarse layer of a varve is commonly overlain by microlaminared silt and clay, reflecting variable streamflow during summer. |
Each annual layer, known as a varve, contains organic evidence of the earth's climate and ocean temperatures for the year it was deposited, Briskin says. |
We do not have this in earlier periods and so we must use other methods, the main ones being varve counting, ice-core timescales and uranium series dating. |
In Sweden, by contrast, it has been possible to tie a glacial varve chronology to present time, and so create a truly absolute dating technique. |
To varve, turn roast on a cut end and slice meat away from rack of bones. |
Thirty-six couplets were distinguished in the stratified calcareous clayey silt between 700 and 670 cm, however, varve counting in these rhythmites was aggravated. |