How do you use ocean sediments to tell about past climates?

Both forms are used.

Palynology is the science of studying pollen grains, and other small (ex-)organic material. These have a very distinct shape for different species, and survive well. Thus one may recover pollen...

la mooon

Well see people take dumps in the ocean then the dumps start on fire which then turn into ash and sink to the bottom forming sediment.

Used