Fundamentals of Sedimentary, Igneous, and Metamorphic Rocks

From the study guide

Course Outline

  1. Sedimentary Formation
  2. Sedimentary Structures
  3. Depositional Environments
  4. Sedimentary Fossils
  5. Igneous Cooling
  6. Igneous Composition
  7. Igneous Textures
  8. Metamorphic Agents
  9. Metamorphic Minerals
  10. Metamorphic Textures
  11. Deformation Types

1. Sedimentary Formation

Key Concepts & Definitions

  • Weathering: The breakdown of rocks at Earth's surface through physical (e.g., freeze-thaw, exfoliation) or chemical (e.g., hydrolysis, carbonation) processes.
  • Erosion: The removal and transportation of weathered rock fragments by agents such as water, ice, or wind.
  • Transport: The movement of sediments by agents like rivers, glaciers, or waves, which causes grain size reduction (attrition, abrasion) and sorting.
  • Deposition: The process where transported sediments settle when energy decreases, forming layers.
  • Lithification: The transformation of loose sediments into solid rock via compaction (pressure) and cementation (mineral precipitation).
  • Diagenesis: All chemical and mineralogical changes occurring after burial, including mineral recrystallization and stabilization, before metamorphism.

Essential Points

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Practice quiz preview

1. What does sedimentary formation refer to?

2. What is the primary role of sedimentary structures in sedimentary rocks?

3. How do continental and marine depositional environments differ in terms of sediment types and structures?

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Flashcard preview

Sedimentary formation — processes?

Weathering, erosion, transport, deposition, lithification.

Sedimentary structures — purpose?

Record depositional conditions and flow dynamics.

Depositional environments — types?

Continental, transitional, marine.

Weathering — definition?

Breakdown of rocks at Earth's surface.

Erosion — role?

Removes and transports weathered rock.

Transport — effect?

Reduces grain size, causes sorting.

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