“…Treibs, 1934;Brocks et al, 1999;Vandenbroucke, 2003) and sedimentary rock (Albrecht and Ourisson, 1971). Fossils, too, were increasingly often found to contain organic matter (Kidwell and Holland, 2002;Behrensmeyer et al, 2000;Briggs, 2003), be it in cephalopod shells (Abelson, 1954;Westbroek et al, 1979), belemnite rostra (Bandel and Spaeth, 1988;Florek et al, 2004), bones (Abelson, 1954;Schweitzer et al, 2005Schweitzer et al, , 2007Asara et al, 2007), or wood (Boyce et al, 2001;Siurek et al, 2004).…”