carboniferous

核心释义

1. 1.

   古生代的一个地质时期,包括密西西比世和宾夕法尼亚世的早、中、晚期,约3.45亿至2.8亿年前,煤系地层形成时期。

   Of a geologic period within the Paleozoic era; comprises the lower, middle and upper Mississippian and lower, middle and upper Pennsylvanian epochs from about 345 to 280 million years ago, when coal was laid down.

2. 2.

   含碳的；产碳的。

   Containing or producing carbon.

含碳的；产碳的。；含碳或煤的