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  1. The Basics of Geology - ThoughtCo

  2. An Introduction to Geology – Free Textbook for College-Level ...

  3. Geology | Definition, Examples, Rocks, Study, Importance, & Facts ...

  4. Lecture Notes and Slides | Introduction to Geology | Earth, …

  5. 1.1: What is Geology? - Geosciences LibreTexts

  6. Introduction to Geology - MIT OpenCourseWare

  7. Fundamentals of Geology (Schulte) - Geosciences LibreTexts

  8. Lecture Notes | Introduction to Geology - MIT OpenCourseWare

  9. Fundamentals of Geology - LibreTexts

  10. Rock | Definition, Characteristics, Formation, Cycle, Classification ...