I would like to suggest are slow baby step at a time look at geology.
How do geologists really know what a sample is and how it came to be?
Too often we seem to see very general terms used that then get qualified as a different term but without an explanation of what the differences are and why they are made. I'd like to see if by my asking question those good folk who actually know what they are talking about can 'splain it to me.
Hopefully we can move slowly enough to avoid gross generalities but still keep things simply enough that even I can understand them.
The discussion should move from general terms like sedimentary rock to more specific points like the basic methods sedimentary rocks get produced; to how specific designations are identified and what original materials produce specific final types of rock.
First I like to explore just sedimentary rocks before attempting to identify igneous or metamorphic rocks.
To begin, are all sedimentary rocks produced the same way?
Please, let's go slow and until I understand something put off new questions.
Geology & the Great Flood maybe?