This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A large portion of a continental plate that has been relatively undisturbed since the Precambrian era and includes both shield and platform layers.

n. A part of the Earth’s crust that has survived the splitting and merging of continents.

n. the part of a continent that is stable and forms the central mass of the continent; typically Precambrian

"The greenstones of the Kaapvaal craton in the northeast have been found to contain unicellular and biogenic filamentous structures, signs of some of the earliest forms of life."

crayoned    crayoning    crayons   

writing implement    draw   

crayoned    crayoning   

pencil    pastel    chalk   

pastel    chalk    watercolors    watercolor    lithograph    pencil    pen-and-ink    eraser    water-colour    easel