carbonaceous materials (NASA Thesaurus) Substance composed of or containing carbon or carbon compounds.
Hygiea's surface is composed of primitive carbonaceous material similar to the chondrite meteorites.It is the main member of the Hygiea family and contains almost all the mass in this family (well over 90%).
Cokes are the solid carbonaceous material derived from destructive distillation of low-ash, low-sulfur bituminous coal. Cokes from coal are grey, hard, and porous....
, then the two are reacted with each other to form calcium carbide ...
of Central Florida, both arrived at the same conclusion that the signatures they were reading could be explained by the presence of an extremely thin layer of frost covering the whole asteroid, and that it is mixed with carbonaceous material.
Uranus has a system of narrow, faint rings.
Ring particles are dark, and could
consist of rocky or carbonaceous material.
The picture above shows a variety of these features, although in the reproduction they may be hard to see. The road-like fissures can easily be seen. Two volcanoes show up as dark plumes of carbonaceous material.
Also of interest ...
Asteroids can be classified into three main types, according to their spectra: the C-types are made of carbonaceous material, S-types consist mainly of silicates, and M-types are 'metallic'. C- and S-type asteroids are the most common.
using the known half-life of an unstable element, one can calculate the amount of time that has elapsed since a known level of isotope existed. The most widely known example is radiocarbon dating used to determine the age of carbonaceous materials.
 See also: Earth, Time, Period, Planet, Norma
  
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