I want to know the answer to the following question:
What natural substance was used in early road pavings?
All the background I'm provided with is that "In many cases, these early pavings were made from naturally occurring "bituminous rock", such as at Ritchie Mines in Macfarlan in Ritchie County, West Virginia from 1852 to 1873.". Is that enough to answer the question?
Answer: yes