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

  2. Introduction to Geology - MIT OpenCourseWare

  3. Physical Geology - Open Textbook Library

  4. Geology 101: Physical Geology Course - Online Video Lessons

  5. Geology 101 - YouTube

  6. An Introduction to Geology (Johnson, Affolter, Inkenbrandt, and Mosher)

  7. Laboratory Manual for Introductory Geology - Open Textbook …

  8. 1.1: What is Geology? - Geosciences LibreTexts

  9. Geology 101 - National Geographic Kids

  10. 1: Introduction to Geology - Geosciences LibreTexts