Vividly demonstrate various tectonic processes with this easy-to-use, hands-on model. Using colored sands, students can model the formation of folds; reverse and growth faults; and expansion and rift valleys. Demonstrate the effects of compression on fold and fault formation; surface erosion and unconformity; and earth mass movement. Use with plaster to make permanent models of specific tectonic processes. Includes Teacher's and Student's Guides. Size is 10 1⁄2L x 6W x 6 1⁄2H". Neo/Sci®