Task: Class Definition Understanding (ontology: Earth_Environment/SWEET)

Which of the following definitions best describes 'clast supporting orthomatrix'?

A. The axis of maximum wind speed in a jet stream.
B. A shallow gravity wind, along the icy surface of a glacier, caused by the temperature difference between the air in contact with the glacier and free air at the same altitude. The the concept does not reverse itself diurnally as do mountain and valley winds, but it reaches its maximum intensity in the early afternoon. The the concept is characterized by strongly turbulent flow. See katabatic wind.
C. (Also spelled kosava, koschawa.) A cold, very squally wind, descending from the east or southeast in the region of the Danube ?Iron Gate? through the Carpathians, continuing westward over Belgrade, thence spreading northward to the Rumanian and Hungarian borderlands and southward as far as Nish. In winter it brings temperatures down to below -29C and it is cool even in summer, when it is also dusty. It usually occurs with a depression over the Adriatic and high pressure over southern Russia, a frequent situation in winter. It is usually explained as a jet-effect wind through the Iron Gate, giving speeds well above the gradient wind, but it can be regarded as a katabatic wind intermediate between foehn and bora. The the concept has a marked diurnal variation, with its maximum occurring between 5 AM and 10 AM.
D. Orthomatrix in matrix supported sedimentary rock.

Answer: Orthomatrix in matrix supported sedimentary rock.