Question: what are the main characteristics of sedimentary rocks?
Answer: Bedding. Bedding is often the most obvious feature of a sedimentary rock and consists of lines called bedding planes, which mark the boundaries of different layers of sediment. ... 
Graded beds are common when a sediment is being deposited by a slow‐moving current. ... 
Fossils. ... 
Desiccation cracks and ripple marks.