Bark Mounds

Xenobiological fungi known as bark mounds. These pictured, are notable for what is known as a heteroatom; an atom other than carbon or hydrogen, found in organic molecules. The pictured exhibit the presence of two known macronutrients; sulfur and phosphorus, making them interestingly ready for process into an organophosphate; useful for agriculture. Four macronutrients were not found; nitrogen, potassium, calcium, and magnesium. Carbon is present, at 13.9% and Iron at 19.9% concentrations, though there is a lack of both hydrogen and oxygen.

What has yet to be determined is their underlying organic structure, and elements required for growth and sustainment.

Unfortunately only surface analysis can be accomplished, due to program restrictions. Working inside of these restrictions, a quick visual inspection noted:

Soil layers are known as horizons, with the top layer (bottom picture,) showing strong mineral indicators of the before mention sulfur and phosphorus combination; not unheard of in actual plants, though interesting to see this far out. The subsoil horizon shows rich humus (decomposed organic matter,) in both the juvenile (right of picture,) the teen-adult (middle picture,) and the matured, (briefly showing on the left).
A couple of days were cataloged, with no apparent photosynthesis requirement noted.