Compared to the mid-ocean ridge, sediment near the continents is:

Sediments near the continents is known to have coarser grains.

To add, sedimentary rocks are types of rock that are formed by the deposition and subsequent cementation of that material at the Earth's surface and those within bodies of water. 

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this

the answer to your question is tooth decay.