Seems like a pretty logical concept; in order to make money, you need to buy something at a price and be able to sell it for a higher price. (tapintoteenminds.com)
Providing the key geo - logical concepts of context and sequence, without which the animals were so many cherries without a cake, the scheme is well explained by Peter Doyle and Eric Robinson's complementary (and, by Sod's law, near - simultaneous) article (Proceedings of the Geologists» Association, vol 104, pp 181 - 194) which gives much fuller references than the book's skimpy listing (see also vol 106, pp 71 - 78). (newscientist.com)
Since I will probably struggle to understand the highly intellectual and logical concepts, perhaps you wouldn't mind attaching a dumbed down, paraphrased verson for me? (nakedpastor.com)