Figure F11. Ratio of C29 5α,14α,17α(H)20R sterane to C29 Δ4 and Δ5 sterenes, Site C0020. Data plotted by sample type (solid circles = coal, open circles = mudstone, x = drill cuttings, + = siltstone). Inset displays data from Hokkaido (Amo et al., 2007) used to calculate lines for 22° and 25°C/km geothermal gradient.
Previous | Close | Next | Top of page