gray hematite

gray hematite

[¦grā ′hē·mə‚tīt]
(mineralogy)
Mentioned in ?
References in periodicals archive ?
25, 2004, will explore Meridiani Planum, an area with deposits of an iron oxide called gray hematite. This material, coarser than the reddish hematite that gives Mars its rusty color, usually forms after hot water flows through and dissolves iron from rocks.
Not only does it offer a flat surface for the rover to explore, but it also has traces of iron oxide mineral known as gray hematite. The presence of gray hematite on Earth usually indicates the presence of water or lava.
On Earth, gray hematite commonly forms in lakes and hot springs, but it can also form by volcanic processes.