例句與造句

1. The "'Boulder Creek Formation "'is a geologic formation in northeastern British Columbia.
2. The shales of the Hulcross abruptly overlie the sandstones of the Gates Formation and grade into the overlying sandstones of the Boulder Creek Formation.
3. The Boulder Creek Formation conformably overlies the marine shales of the Hulcross Formation, and is conformably overlain by the marine shales of the Hasler Formation.
4. It's difficult to find boulder creek formation in a sentence. 用boulder creek formation造句挺難的