COMPARISONS
Host
Source
Fe moving fluids
Precip. fluids
Concretion
Cement
Geometries
Accumulations
Crystals
Quartz sandstone Fine-grain
sed +sulfates?
Grain coats Basalt?
jarosite?
Reducing Acid
brine
O2 groundwater O2 groundwater
Insitu, within beds
Insitu, within beds
Hematite, goethite
Hematite
Spherules + variety
Spherules + more
Surface + topo lows
Surface + lows
Cement, + crystalline Pure,
crystalline
UTAH
MARS
