Ruth E. Blake is an American geochemist and environmental scientist.
Blake's work focuses on marine biogeochemical processes, paleoclimate, astrobiology, and stable isotope geochemistry.
[2] Blake's doctoral research focused on how microbial activity can affect oxygen isotopes in phosphates.
[3] While a professor at Yale, Blake expanded on her graduate research focus using isotopic evidence in ancient marine phosphates to show that there was significant biological activity in the ocean during the Archean era.
[4] Blake has worked on numerous other research topics related to biological and/or chemical activity in oceans, sediments, and soils.