David Rowley, a geologist at the University of Chicago in Illinois, and a team of geodynamical modelers simulated the lava lamp - like movement of hot material in Earth's mantle, which is a highly viscous though solid layer of rock between the crust and the molten core. (sciencemag.org)
Paint is a liquid substance which forms solid layer after drying. (wallpaintideas.org)
Demand a mid-length cut with solid layers that begin at the cheekbone then follow further. (galstyles.com)