石炭系

Traditional form:

石炭系

Pinyin (reading):

shítànxì

Definitions:

• carboniferous system
• coal measure (geology)

Characters:

• 石 - stone, rock, mineral
• 炭 - carbon, charcoal, coal
• 系 - system; line, link, connection

Traditional characters:

• 石 - stone, rock, mineral
• 炭 - carbon, charcoal, coal
• 系 - system; line, link, connection