GEOL 1001 Chapter : Chapter 1
Document Summary
The rocks at the bottom of the grand canyon are 1. 7 2. 0 billion years old. The most recent layer of sediment is about 250 million years old. The explosive impact of a meteorite created this 1. 2 km wide crater in just a few seconds: the geologic time scale (check textbook) Examples (everyday uses of the scientific method: light switch doesn"t work, car won"t start, made a bad grade, any kind of interactions. Temperatures within the earth: temperatures increase with depth in the earth. Variation of t with depth defines the geothermal gradient or geotherm. Composed of igneous rock that has been fractured and uplifted: rocks and the rock cycle, basic rock types: Igneous rocks cooling and solidification of magma (molten rock). Examples include granite and basalt: sedimentary rocks accumulate in layers at earth"s surface. Sediments are derived from --: metamorphic rocks formed by changing pre-existing igneous, sedimentary or other metamorphic rocks.
