This is the most well written question I have ever heard.
such as a swamp,marsh or bog
top soil
Muskeg is the name of a swamp or bog made up of a deep accumulation of decaying vegetation and sand or soil. There may be similar accumulations in the northern parts of many areas of the world but only the North American (Canadian) sites were initially named muskeg a word borrowed from the Cree First Nation's language word "maskek" (a low lying marsh).In other locations muskeg may be called a peat bog, quagmire, swamp land, mire, fen or marsh.
yes
Any swamp, marsh, or bog. The classification of whether a plot of land is a "wetland" or not depends on the soil type, level of saturation within the soil, and the flora found on the plot. Perhaps in this case the term "organic" refers to the level of peat in soil but I struggle to imagine an inorganic wetland.
The name or word "marais" means "marsh" or "swamp" in French. It can refer to a wetland or low-lying area typically characterized by waterlogged soil and vegetation. It is also a common surname in French-speaking regions.
Iron
Swamp
maybe clayey soil ...
hey
Soil
Brackish mud