yardang in a sentence

1. The famous Great Sphinx of Giza in Egypt may be a modified yardang.
2. There is a famous yardang at Great Sphinx of Egypt is an augmented yardang.
3. There is a famous yardang at Great Sphinx of Egypt is an augmented yardang.
4. Pictures from Mars show that the yardang ridges occur on a massive scale there; some individual ridges are tens of kilometers long with intervening valleys nearly 1 km wide.
5. A "'yardang "'is a streamlined protuberance carved from bedrock or any consolidated or semiconsolidated material by the dual action of wind abrasion by dust and sand, and hull of a boat.
6. It's difficult to find yardang in a sentence.