The lack of correlation with the initial sediment composition and the gradual decrease in δ¹⁵N indicates a microbial control on δ¹⁵N change. The diagenetic changes in the stable isotope values that ...

Geologists call the layers of light and dark sediment laid down on the floors of glacial lakes varves. A lake's varves are its archives, a record of its summers and winters.

By coring deep into the bottom, the researchers bring up columns of varves — laminated layers of sediment. Each varve represents a year of sedimentation dominated by a summer “pulse of sediment” ...

Varves are the layered sediments that form when meltwater below ... since there would have been a higher volume of water to carry the sediment. The team also compared the varves to cores from ...

Geologists call the layers of light and dark sediment laid down on the floors of glacial lakes varves. A lake's varves are its archives, a record of its summers and winters.

The stripes-within-stripes at this scale are called varves, and they likely represented annual layers of sediment stacked on top of each other. The varves told geologists about the amount of time ...

'Varves are annual sediment laminations which have the additional advantage that the shift from well-oxygenated to at least seasonal hypoxic conditions can often be precisely dated' says co ...

The Michigan Department of Environment, Great Lakes, and Energy (EGLE) estimated in March of 2021 that around 450,000 cubic yards of sediment were released into the river during the unauthorized ...