Across
- 3. Coarse-grained, multi-colored igneous rock, with quartz and feldspar, formed from slow cooling magma.
- 4. Combustible black or brownish-black sedimentary rock with a high amount of carbon and hydrocarbons.
- 7. Metamorphic, smooth and polished, this white to multi-colored stone started as limestone, transformed by heat and pressure.
- 9. Volcanic glass, smooth and black, formed from rapid cooling of felsic lava without crystallization.
- 11. Grainy, layered sedimentary rock, ranging in color from red to beige, formed by compacted sand over time.
- 12. Sedimentary rock, smooth and fine-grained, formed from compacted clay and silt, often found in muddy environments.
- 13. A hard, glassy mineral, often clear or white, with a hexagonal crystal structure made primarily of silicon dioxide.
- 14. A dark, fine-grained igneous rock, rich in iron and magnesium, formed from rapid cooling lava at Earth’s surface.
Down
- 1. Sedimentary rock, typically light-colored, made mostly of calcium carbonate, often home to fossils from marine life.
- 2. Light, porous volcanic rock, formed when gas-rich lava cools rapidly, often floating on water.
- 3. Soft, slippery mineral, grey to black, a form of carbon used in pencils, with a layered crystal structure.
- 5. A metamorphic rock with fine layers, dark grey to black, formed from shale under pressure and heat.
- 6. Rock formation with a hollow center lined with crystals, typically formed in volcanic or sedimentary environments.
- 8. Pink variety of quartz, prized for its color and crystal structure, composed of silicon dioxide.
- 10. Preserved remains trapped in sedimentary rock, often ancient and organic, telling tales of past life.