单词：subcarboniferous
音标：['sʌb,kɑ:bә'nifәrәs] ；
亚石炭系
a. Of or pertaining to the lowest division of the
Carboniferous formations underlying the proper coal measures. It was a
marine formation characterized in general by beds of limestone.
n. The Subcarboniferous period or formation.
Carboniferous formations underlying the proper coal measures. It was a
marine formation characterized in general by beds of limestone.
n. The Subcarboniferous period or formation.