I think you would benefit by perusing a good historical geology textbook
before
attempting to read any technical papers (blue-green algae aren't really
plants,
they're a type of bacteria!). May I recommend:
Levin, H.L. 1996. The Earth Through Time. Saunders College Publishing.
I used it to teach Historical Geology last spring and it does briefly
discuss the
evolution of the early prokaryotes (Kingdom Monera) into everything we see
today
(and includes a list of supplemental readings at the end of each chapter).
- Steve.
-- Steven H. Schimmrich, Assistant Professor of Geology Department of Geology, Geography, and Environmental Studies Calvin College, 2301 Burton Street SE, Grand Rapids, Michigan 49546 sschimmr@calvin.edu (office) / schimmri@earthlink.net (home) 616-957-7053, 616-957-6501 (fax) http://home.earthlink.net/~schimmrich/