The full-color model diagrams a crosssectional
view of the substructure of
a volcano, showing the processes by
which rocks change from one type to
another. Students can examine 20
actual samples of rocks and minerals,
numbered for easy identification: basalt,
calcite, coal, conglomerate, feldspar,
gneiss, granite, iron ore, lead/zinc ore,
limestone, marble, obsidian, pumice,
quartz, quartzite, rhyolite, sandstone,
schist, shale, slate. It comes with a
teacher’s guide. Size: 24”L x 18”W x 2
1/2” H.