Sedimentary rock forms when particles of rock, minerals, and organic matter accumulate and are compressed over time. As for presenting it in a comic, that could be a fun and educational way to show the process visually.
The formation of sedimentary rock involves the accumulation and consolidation of sediments. Water plays a big role in moving the sediments to the right places. It's possible to show this process in a comic with colorful illustrations and simple explanations to make it engaging and accessible for all ages.