Fig. 4: Schematic illustrations of fluid flow regimes and key microbial populations.
From: Deep microbial proliferation at the basalt interface in 33.5–104 million-year-old oceanic crust
In basaltic basement, substrates are distinctively supplied from seawater and basalt rocks in 8–13.5 Ma (a) and 33.5–104 Ma (b). Blue and red arrows indicate abundant substrate supplies from seawater and basalt rocks, respectively.
