Science. 1962 Jul 20;137(3525):221-4. doi: 10.1126/science.137.3525.221.
The Chattanooga shale contains insoluble organic matter (kerogen) derived from terrestrial (humic) and from marine (sapropelic) sources. Kerogen from sapropelic sources contains more hydrogen than kerogen from humic sources. Thus the hydrogen content of the sapropelic contribution, and of the kerogen, increases toward that part of a shale most likely to be a source bed for petroleum. Uranium in the shale is derived from the adjoining land mass.
查塔努加页岩含有来源于陆地（腐殖质）和海洋（腐泥质）的不溶性有机质（干酪根）。腐泥质来源的干酪根比腐殖质来源的干酪根含有更多的氢。因此，腐泥质贡献的氢含量以及干酪根的氢含量朝着最有可能成为石油源岩层的那部分页岩增加。页岩中的铀来自相邻的陆地。
