Science Advances

Supplementary Materials

This PDF file includes:

  • Section S1. Geological setting
  • Section S2. Mineralogical and geochemical analysis of concretions
  • Section S3. Experimental formation of Fe-oxide concretions
  • Section S4. Numerical simulation to estimate formation time scales
  • Fig. S1. Landsat image, geologic map, CO2 reservoir and volcanic rock distribution, and conceptual model of CO2-charged groundwater in Utah.
  • Fig. S2. Outcrop photographs, morphologies and microscopic textures of Fe-oxide, and calcite concretions in Utah.
  • Fig. S3. Location map, outcrop photographs, morphologies and microscopic textures of Fe-oxide, and calcite concretions in Mongolia.
  • Fig. S4. XRD pattern of concretions and Fe-oxide crusts.
  • Fig. S5. Elemental distributions in and around the Fe-oxide concretions (stage 2) in Mongolia.
  • Fig. S6. Elemental distributions in and around the Fe-oxide concretions (stages 2 and 3) in Utah.
  • Fig. S7. Experimental study of Fe-oxide concretion formation.

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