from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A dark-green igneous rock consisting largely of chrysolite, with pyroxene and picotite.
from the GNU version of the Collaborative International Dictionary of English
- n. An igneous rock consisting largely of chrysolite, with pyroxene and picotite (a variety of spinel containing chromium).
from The Century Dictionary and Cyclopedia
- n. A crystalline aggregate of olivin, enstatite, and diallage, with some picotite: a rock occurring about Lake Lherz and in the adjacent regions in the French Pyrenees.
The signal buried in the Galileo data indicated that it came from a type of rock similar to lherzolite - a coarse-grained, relatively loosely compressed rock - within Io, and quite a lot of it.
On Earth, lherzolite is never found below certain depths since the pressure would cause it to convert to a different, denser type of rock.
Tests have shown that the signatures detected by Galileo are consistent with a rock like lherzolite, an igneous rock rich in silicates of magnesium and iron.
All three lithologies have abundant mantle xenoliths (eclogite, garnet lherzolite and garnet harzburgite) up to 20 cm in size and abundant mantle-derived garnets.