Abraham Werner:
http://www.encyclopedia.com/topic/Abraham_Gottlob_Werner.aspx
http://www.nndb.com/people/244/000103932/
http://biography.yourdictionary.com/abraham-gottlob-werner

Georges Cuvier:
http://www.britannica.com/EBchecked/topic/147625/Georges-Cuvier
http://www.newworldencyclopedia.org/entry/Georges_Cuvier
http://www.ucmp.berkeley.edu/history/cuvier.html

James Hutton:
http://sacred-texts.com/earth/toe/index.htm
http://www.thisoldearth.net/Geology_Online-1_Subchapters.cfm?Chapter=4&Row=6
http://www.britannica.com/EBchecked/topic/277702/James-Hutton
http://www.eoearth.org/view/article/153614/

Charles Lyell:
http://www.britannica.com/EBchecked/topic/352672/Sir-Charles-Lyell-Baronet/4378/Scientific-eminence
http://www.nndb.com/people/249/000086988/

Plutonism:
http://www.edinburghgeolsoc.org/downloads/rigsleaflet_hutton.pdf
http://www.britannica.com/EBchecked/topic/229486/geochronology/70044/The-emergence-of-modern-geologic-thought#ref586373

Uniformitarianism:
http://www.britannica.com/EBchecked/topic/614600/uniformitarianism

Neptunism:
http://www.britannica.com/EBchecked/topic/409377/Neptunism
http://www.univie.ac.at/wissenschaftstheorie/heat/heat-2/heat241f.htm

Catastrophism:
http://www.newworldencyclopedia.org/entry/catastrophism
http://abyss.uoregon.edu/~js/glossary/catastrophism.html