Definition of clayey:
impenetrable, sullen, labored, grave, laborious, wakeless, ponderous, weighed down, compact, threatening, lowering, hard, sonorous, great, expectant, grievous, toilsome, lumbering, overweight, profound, punishing, argillaceous, enceinte, large, intemperate, gruelling, sound, big, arduous, backbreaking, leaden, dense, heavy, with child, cloggy, operose, grueling, laboured, fleshy, weighty, gravid.
- "Australia Twice Traversed, The Romance of Exploration Australia Twice Traversed. The Romance Of Exploration, Being A Narrative Compiled From The Journals Of Five Exploring Expeditions Into And Through Central South Australia, And Western Australia, From 1", Ernest Giles.
- "The Antiquity of Man", Charles Lyell.
- "The Economic Aspect of Geology", C. K. Leith.