Figure 15. Field occurrences and morphologies of Microfacies 3 sinter. (1) Flat, sinter deposit (brown colour) over which thermal water flows (blue arrows). Microfacies 2 sinter forms on pumice clasts above water level (black arrows). Hammer to the upper right is ~30 cm long. (2) Close-up of Microfacies 3 sinter showing irregular surface texture. (3) Patchy silicification (yellow arrows) and the beginnings of rim formation (red arrow). The rims are frequently above water level. Bar represents 2 cm. (4) Formation of a cup-like deposit (red arrow) that is continuous with the flat, parallel laminated sinter below. Coin is 2.5 cm wide.