| 31. | Some minerals that are commonly associated with akhtenskite are : todorokite, pyrolusite, nsutite, goethite, and cryptomelane.
|
| 32. | This caused the iron to precipitate out as hematite and goethite to form the innumerable concretions found in the Navajo Sandstone.
|
| 33. | Thus detrital ferric hydroxides, including goethite and ferrihydrite, will spontaneously transform into red-colored hematite pigment with time.
|
| 34. | It is thought that eroded craters or minerals directly connected to the existence of liquid water ( such as Goethite ).
|
| 35. | The iron became fixed in place in the river channels and gradually replaced the existing humic material via replacement with goethite.
|
| 36. | Two types of laterite can be identified; both types consist of the minerals kaolinite, quartz, hematite and goethite.
|
| 37. | The main iron oxide is goethite ( FeOOH ), with enough hematite ( Fe2O3 ) to make the soil red.
|
| 38. | These ferric hydroxides commonly include goethite ( FeO-OH ) and so-called " amorphous ferric hydroxide " or limonite.
|
| 39. | It is a variety of quartz with fibers of goethite or hematite usually in colors of red, gold, and black.
|
| 40. | The feces have been preserved due to the replacement of the original fecal material by goethite, siderite and other iron minerals.
|
