An ancient clay deposited as geological strata on the bottom or shore of a lake. Lacustrine clays are considered high quality and are similar in composition to estuarine clays.
Sources Checked for Data in Record
- Robert Fournier, Illustrated Dictionary of Practical Pottery, Chilton Book Company, Radnor, PA, 1992
- Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998