Week 8
Low Chroma
In soil, when iron receives protons and electrons (gets reduced) that were once a part of organic matter (which is
thus oxidized), that soil iron turns grey. so THAT’S why wetlands have gray soil!
Q: What do bacterial cells really need?
A: A place to dump the hydrogens (a proton and an electron)
Noble gasses are stable/inert
There is sulfur in seawater
Bacteria gets rid of the sulfur by eating the organic matter
Where so salt marshes form?
-behind barrier islands
Salt marshes are not dunes.
Rivers flow through two types of drainage basins
2 Types of Drainage Basins:
-Dendritic
-Lattice-Style
Which came first? Rivers or the mountains? – RIVERS
3 things needed for salt-marsh formation: Sediments get eroded, transported, and deposited
Mountains erode and the sediments are carried by the high order streams of the watershed.
Headwaters
-not much wetland acreage
-Rivers transport the eroded sediments
-Sediments are deposited as water slows in “low gradient” streams of the coastal plain
Deposits: Deltas
The 64,000 square mile watershed that is drained and provides freshwater to Chesapeake Bay. This is involved
in erosion, sediment transport, and deposition.
Sediments are deposited in the sluggish, mixing waters of Chesapeake Bay’s mainstem and tributaries.
Sal marshes near the mouths of rivers