Lithogenous sediment:  a) What kind of material is this?  W…

Lithogenous sediment:  a) What kind of material is this?  Where does it come from? b) What brings this sediment from land to the ocean around Alaska?  Give at least two answers, WITH EXPLANATION (approximately two sentences each).  Extra credit for a good third answer to part (b).

Sediment grain size: a) What is the relationship between (1)…

Sediment grain size: a) What is the relationship between (1) the size of sediment grains and (2) the energy of the water that carries those sediment grains?    Notes:1. This question is not about well-sorted versus poorly sorted sediments.  It’s about grain size.2. You should assume that the water we are talking about does not change the grain size of the sediments; it simply carries them. b) Suggest what oceanographers can learn from mapping the grain sizes of sediment that has settled onto the seafloor.