In this paper, chromophoric dissolved organic matter (CDOM) was first in site continuous measured by the fluorometer in the estuarine water column in China.
Relative higher concentration of gammacerane in Songliao fresh-brackish lacustrine environment is connected with water column stratification caused by event of linking between lacustrine and sea.
And they're typically preserved as what are called rainout deposits, where the sediment is just gradually falling out from the water column onto the seabed.