we were here now – shale layers The bottom: shale (dark brown) and limestone (greys and black) Like this:Like Loading... Share the love:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to email a link to a friend (Opens in new window)Like this:Like Loading... Let me know what you think!Cancel reply This site uses Akismet to reduce spam. Learn how your comment data is processed.
