This image is in the public domain in the United States because its copyright has expired. Courtesy of Wikipedia Commons: http://en.wikipedia.org/wiki/File:Charles_Lyell00.jpg
BRANCH is an open-access publication 
This image is in the public domain in the United States because its copyright has expired. Courtesy of Wikipedia Commons: http://en.wikipedia.org/wiki/File:Charles_Lyell00.jpg
BRANCH is an open-access publication