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Ch. 12-Geology Pt. 2
Environmental Ecology- Geology & Non-Renewable Resources
| Term | Definition |
|---|---|
| Minerals | Naturally occurring material on/in the Earth's surface with an internal crystalline structure. |
| Metallic Minerals | Examples include Al, Fe (iron), Au (gold), Ag (silver) |
| Non-Metallic Minerals | Examples include sand, gravel |
| Single Element Mineral | Au (gold), Ag (silver) |
| Several Elements Minerals | Salt (NaCl), Quartz (silicon dioxide) SiO2 |
| Rock | Made up of one or more minerals that is part of the Earth's crust |
| Single Mineral Rock Composite | Example: Limestone (calcium carbonate)- CaCO3 |
| Several Mineral Rock Composite | Example: Granite (mixture of mica, feldspar, and quartz) |
| Ore | Rock that contains metal |
| Rock Formation | 1. Igneous Rock 2. Sedimentary Rock 3. Metamorphic Rock |
| Igneous Rock | Either on/inside Earth's crust formed from magma/lava Ex: Granite |
| Sedimentary Rock | Rock that forms in layers from dead plants and animals over time Ex. Sandstone, limestone, shale |
| Metamorphic Rock | Pre-existing rock that is reshaped internally from high temperature and pressures. Ex. Slate, Marble |
| Rock Cycle | Is the slowest of all cycles and considered the most important: 1. Concentrates non-renewable resources. (Releases minerals to food chain) 2. Continuance of life on planet. |
| Get Coal: | Mining of Mineral Deposits |
| Surface Mining | 1. Open-Pit: Big Hole 2. Area Strip Mining: Flat Surface 3. Contour Strip Mining- Leaves some vegetation, occurs on hills/mountain sides |
| Sub-Surface Mining | 1. More environmentally sound. 2. Uses about 10% less land. 3. Generates less mining waste. |
| Environmental Effects of Mining | 1. Scarring/destruction of land 2. Potential for land collapse (subsidence) 3. Pollution of land/water 4. Toxic mining waste 5. Toxic air emissions 6. Tailings |
| Subsidence | Potential for land collapse |
| 75% | ...of all US solid waste is generated by mining. |
| Sulfuric Acid | FeS (Iron Sulfide) when digging reacts with aerobic bacteria + H2O = H2SO4- Runs off into stream |
| Tailings | Metallic ore waste. |