Buy and read some textbooks that cover the required undergrad courses at a university. Here are a few that come to mind: structural geology and tectonics, sedimentology/stratigraphy, geophysics, earth materials (mineralogy), earth systems, petrography and petrogenesis, field methods and maybe volcanism and oceanography.

But back to your question... If you're mainly concerned with rock formations (sed/strat) then just read this book or this one, they will help you tremendously. Hope this helps!

u/omen2k · 3 points r/geologycareers

Whilst I don't know where you could learn online, I highly recommend looking up publicly available field courses in basic geology. You would learn alot and be able to go out hiking!

If you're interested in sedimentary geology, Gary Nichol's book is excellently written, organised, and I would say is very accessible by the layman.

I'd also recommend the different Geology Field Guide Books as they are small, easily looked through and designed to be taken into the field. They have one for sedimentary, igneous, metamorphic and structural I think, very good books that would definitely get you through at least the first 2 years of an undergrad bachelors in Geology.

EDIT: on further investigation I think I meant the Field Description book series. Either look pretty good for a basic grounding.

EDIT 2: I also forgot to mention they're relatively cheap compared to most academic texts!

u/Betelgeuse39 · 1 point r/exchristian

Just remembered another book that's worth looking into - Sedimentation and Stratigraphy if you want a good summary of sedimentary rocks etc

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