Fig. 3: TEM imagery of X-ray amorphous material.
From: Fe-rich X-ray amorphous material records past climate and persistence of water on Mars
Amorphous and nanocrystalline materials were confirmed through fast Fourier transform (FFT) scans presented as inset boxes. A Intermixed truly amorphous and nanocrystalline materials from the clay-size fraction from the BC horizon (23–33 cm depth interval) in the Eunice Bluff soil in the Klamath Mountains. Zones of nanocrystalline packets (FFT-2, EDS-2) contain elevated Fe content relative to truly amorphous gel material (FFT-1, EDS-1). B Amorphous gel material from the clay-size fraction from the Devil’s Punchbowl soil (C Horizon, 20–35 cm depth interval).
