If you were to dig into the asthenosphere, you would encounter material that: Question 15 options: is rocky, but with a high abundance of water that has seeped down from the oceans, making it relatively 'slippery' (so it can flow) is soft and malleable, able to move and flow fairly readily is rocky and dense, completely unyielding appears rocky and brittle, but which would 'flow' under extremes of pressure and temperature