白垩 (bái è) — chalk (calcium carbonate, soft limestone)

Definition

白垩 (bái è) is a soft white limestone (calcium carbonate) — the geological term, not classroom chalk (which is 粉笔). Also names the Cretaceous period (白垩纪).

noun

chalk (calcium carbonate, soft limestone)

Measure word · 种

Examples

白垩。
Zhè zhǒng bái è zhǔ yào yòng yú gōng yè hé jiàn zhù.
This kind of chalk is mainly used in industry and construction.
。
Kǒng lóng zài bái è jì fēi cháng fán shèng.
Dinosaurs flourished in the Cretaceous period.
白垩。
Kē xué jiā zài yán céng zhōng fā xiàn le dà liàng bái è.
Scientists discovered a large amount of chalk in the rock layers.

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