platy

platy

[′plad·ē]

(geology)

Referring to a sedimentary particle whose length is more than three times its thickness.

Referring to a sandstone or limestone that splits into laminae having thicknesses in the range of 2 to 10 millimeters.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.