“Bone beds turn up sporadically elsewhere, with spectacular examples in the Dinosaur National Monument in the USA and in Mongolia’s Gobi desert. In eastern England there are several within the early Cretaceous strata, which include, as well as bones, structures termed coprolites, some of which represent the petrified faeces of dinosaurs or marine reptiles. In the middle of the 19th century, when England’s population was booming and the farmers were struggling to feed everybody, it was discovered that these fragments (which, being bone, are phosphate-rich) made a superb fertilizer when crushed and acid-treated. A thriving and highly profitable industry formed to quarry away these ‘coprolite beds’.
Some considerable figures were involved in this industry. John Henslow, Charles Darwin’s beloved mentor of his time at Cambridge, seems to have first encouraged the farmers of eastern England to use such fossil manure. William Buckland also became involved. An extraordinary combination of early savant of geology at Oxford and Dean of Westminster, he was the first to scientifically describe a dinosaur ( Megalosaurus); carried out his fieldwork in academic gown; reputedly ate his way through the entire animal kingdom; and coined the term ‘coprolite’, using these petrified droppings to help reconstruct the ecology of ancient animals. Later, he energetically collaborated with the celebrated German chemist Justus Liebig (who had worked out how to chemically treat these fossil phosphates to make fertilizer) to show how they could be used by agriculturalists, once demonstrating their efficacy by exhibiting, in Oxford’s Ashmolean Museum, a turnip, a yard in circumference, that he had grown with such prehistoric assistance.
It is related strata (geologically rare phosphate-rich deposits, usually biologically formed) that are still a mainstay—if a rapidly depleting one—of modern agriculture. In a very real sense, these particular rocks are keeping us all alive.”