Chunks of the overlying rock may break off and become a part of a sill. 上復岩石的碎塊可能破裂並成為岩床的一部分。
When you see a termination of a sill you should ask yourself how the intruding magma behaved at the moment of intrusion. 當你看到岩床終端時你應該自問,侵入的岩漿在侵入期是如何表現它們的特徵的。