(plural black shales)
"black-shale." YourDictionary, n.d. Web. 16 December 2018. <https://www.yourdictionary.com/black-shale>.
black-shale. (n.d.). Retrieved December 16th, 2018, from https://www.yourdictionary.com/black-shale
Yes, I'd like to receive Word of the Day emails from YourDictionary.com
By continuing, you agree to our
Please set a username for yourself.
People will see it as Author Name with your public flash cards.