GEOLOGIST k • Obtain a bag of medium sized river gravel. Search through the rocks for various types. Don't worry if you can't • Make a papier-mache volcano. Note - a drop of detergent to the mixture gives a foamier texture to the lava. and walls of our houses; the walkways and roads we travel; the decorations we wear on our clothes or hands, and lastly, the things we stub our toes on or which trip us. • Look for fossils in limestone chunks found around parking identify them. GEOLOGIST Caverns.