...The blue shale,on the contrary, frequently contains numerous concretions,and great abundance of thin layers ofgypsum and crystals of the same... 
W. E. Webb 「Buffalo Land」
...The following are among the concretions found inthe various parts:...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
ランダム例文：
scurrilously Oxbow intrauterine
便利！手書き漢字入力検索
この漢字は何でしょう？？